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Patent File 233 Lithium ion battery recycling

No. Patent number Title Abstract
1 CN108933307 A method for low-temperature integrated recycle of waste lithium ion batteries A method for low-temperature integrated recycle of waste lithium ion batteries is disclosed. The method includes (1) subjecting the waste lithium ion batteries to be recycled to discharging and air drying; (2) pre-freezing the pretreated batteries; (3) subjecting the pre-frozen batteries to freezing and cutting for coarse crushing; (4) subjecting the coarsely crushed batteries to freezing and impacting for fine crushing; and (5) sieving the sample after fine crushing, with an oversize product being battery shells and current collector materials and an undersize product being powder containingpositive and negative electrode materials. Through freeze crushing and sieving separation, electrode materials are efficiently separated from the shell material and current collector materials of thelithium ion batteries, low-temperature crushing does not generate heat accumulation so as to avoid the risk of explosion, and does not generate toxic or harmful gas so that the method is energy-saving, environmentally friendly and high in efficiency. Recovered products are good in quality, can be conveniently recycled, and have promotion value.
2 CN108550942 All-component harmless recycling method of waste lithium ion battery The invention discloses an all-component harmless recycling method of waste lithium ion battery. the method comprises the following steps: pre-sintering the waste lithium ion battery in a resistance furnace, mechanically crushing the pre-sintered waste lithium ion battery, and sorting to obtain positive pole plates and negative pole plates; performing wet stripping on the positive and negative pole plates to achieve an aim of efficiently separating positive active materials and the carbon powder from the aluminum and copper foil, wherein the recycling rate of the lithium-nickel-cobalt-manganese in the separated positive active material is greater than 99%, and the content of each of the aluminum and copper in the positive active material is less than 0.05%. The method disclosed by the invention is simple and easy to realize, two-stage harmless absorption treatment is performed on the electrolyte and organic substance which are hard to recycle in the pre-sintering process, and the problem that the electrolyte volatilizes to pollute the environment in the crushing process of the waste lithium ion battery is solved. The positive active material in the waste lithium ion battery is effectively and thoroughly separated from the aluminum foil by using the wet stripping, and valuable metals in the positive active material containing the nickel, the cobalt, the manganese and the lithiumare efficiently recycled through a wet recycling procedure. The method disclosed by the invention is short in process flow, low in production cost, environment-friendly, and easy in industrialization
3 US6514311 Clean process of recovering metals from waste lithium ion batteries A process of recovering metals from waste lithium ion batteries, wherein the waste batteries are calcined and sieved to generate an ash containing metals and metal oxides. The invented process includes subjecting the ash to a dissolution etching treatment, and a filtration treatment, and separately using a membrane electrolysis method to separate out metal copper and cobalt, wherein the acid generated on the cathode side in the electrolysis process can be recovered through a diffusion dialysis treatment. After electrolysis, the solution rich in lithium ion, after precipitating the metal impurities by adjusting the pH value, can be added with a carbonate ion to form a lithium carbonate.
4 US9147918 Effective recovery of lithium from lithium ion battery waste A process for recovering Li-ions can include: providing a composition having Li-ions to be extracted therefrom; removing materials from the Li-ions; introducing one or more cyclic siloxane to the Li-ions so as to form one or more cyclic siloxane-Li-ion complexes; extracting the one or more cyclic siloxane-Li-ion complexes by one or more liquid-liquid extraction steps; separating an organic phase having the cyclic siloxane-Li-ion complexes from an aqueous phase; removing water from the organic phase; filtering the organic phase to obtain a filtrate; and obtaining one or more Li-ions (e.g., Li salts) from the filtrate.
5 CN108666645 Green peeling method for electrode material of waste lithium ion power battery The invention provides an overall peeling method for a cathode material and an anode material based on the characteristics of compact structure, complicated composition, harmful electrolyte containingand the like of a waste lithium ion battery, wherein aluminum foil is effectively separated from the cathode material in controllable conditions, and then cathode graphite is effectively separated from copper coil while the electrolyte is effectively recycle; the whole technology does not apply corrosive solutions such as strong base, strong acid and strong oxidant, the peeling process is fast and efficient, the composite solvent is low in cost, all sub-systems are linked with each other, thus the method is a green and environment-friendly method for circularly utilizing a waste lithium ion power battery.
6 US20130287654 Leaching solution and metal recovery method A valuable metal recovery method of recovering metals from a lithium ion battery without using complicate steps and by a relatively simple and convenient facility is intended to be provided. For attaining the purpose, lithium is leached selectively from a positive electrode active material containing a composite oxide of lithium and transition metal elements by using a solution showing a weak acidity at a pH of 4 to 7 so that the high Li/Co selectivity is high and a Li recovery rate is high, and lithium is recovered from the leaching solution. By using a solute that the acidity of the acidic solution spontaneously disappears due to evolution of a gas after leaching of lithium, neutralization step is no more required and the volume of liquid wastes is decreased.
7 CN107768760 Lithium resource and salt-alkali recycle method The invention discloses a lithium resource and salt-alkali recycle method, and belongs to the technical field of waste water processing. The lithium resource and salt-alkali recycle method comprises the following steps of (1) obtaining a filtering liquid, a clear liquid and sludge by a multi-stage precipitation and decontamination process; (2) performing nanofiltration on the filtering liquid to obtain concentrated water and a nanofiltration clear liquid; (3) absorbing lithium ions in the nanofiltration clear liquid by ion exchange resin; (4) recycling ethylene carbonate, dimethyl carbonate and distilled water by reduced pressure distillation, cooling, solidification and multi-effect evaporation processes; and (5) electrolyzing to obtain caustic soda by employing an ionic membrane method.By the lithium resource and salt-alkali recycle method, each constituent in high-salt/alkali waste water in a waste lithium battery is symmetrically recycled, 60-80% of waste water can be recycled, the salt-alkali recycle rate is 80-90%, the lithium resource recycle rate is 85-95%, and the recycle rate of the ethylene carbonate and the dimethyl carbonate is 80-85%.
8 US10056656 Manufacturing method of high purity lithium phosphate from the waste liquid of the exhausted lithium-ion battery Provided is a method of manufacturing a high-purity lithium phosphate by utilizing a lithium waste liquid of a wasted battery. Lithium phosphate is manufactured and refined by using a minimized amount of sodium hydroxide and by using phosphate, lithium hydroxide, and an optimized pH condition, so that it is possible to manufacture high-purity lithium phosphate from which fine impurities which cannot be removed by cleaning are effective removed. A waste water treatment process of processing waste water as to be immediately discharged is integrated, so that the method is very efficient and environment-friendly. Therefore, since the high-purity lithium phosphate can be manufactured by utilizing a lithium waste liquid discarded in a wasted battery recycling process, the method has an effect in that the method is applied to a wasted battery recycling industry to prevent environmental pollution and facilitate recycling resources.
9 US20180261894 METHOD AND APPARATUS FOR RECYCLING LITHIUM IRON PHOSPHATE BATTERIES Cathode material from exhausted lithium ion batteries are dissolved in a solution for extracting the useful elements Co (cobalt), Ni (nickel), Al (Aluminum) and Mn (manganese) to produce active cathode materials for new batteries. The solution includes compounds of valuable charge materials such as cobalt, nickel, aluminum and manganese dissolved as compounds from the exhausted cathode material of spent cells. However, LiFePO4 is a waste stream charge material often discarded due to infeasibility of recycling. LiFePO4 is precipitated as FePO4 and remains as a by-product, along with graphite and carbon, which are not dissolved into the solution. FePO4 can be separated from graphite and carbon, FePO4 can be separated from graphite and carbon, FePO.sub.4 can be used to synthesize LiFePO.sub.4 as cathode materials and graphite can be regenerated as anode materials.
10 US20170077564 Method and apparatus for recycling lithium-ion batteries Cathode material from exhausted lithium ion batteries are dissolved in a solution for extracting the useful elements Co (cobalt), Ni (nickel), Al (Aluminum) and Mn (manganese) to produce active cathode materials for new batteries. The solution includes compounds of desirable materials such as cobalt, nickel, aluminum and manganese dissolved as compounds from the exhausted cathode material of spent cells. Depending on a desired proportion, or ratio, of the desired materials, raw materials are added to the solution to achieve the desired ratio of the commingled compounds for the recycled cathode material for new cells. The desired materials precipitate out of solution without extensive heating or separation of the desired materials into individual compounds or elements. The resulting active cathode material has the predetermined ratio for use in new cells, and avoids high heat typically required to separate the useful elements because the desired materials remain commingled in solution.
11 WO2018192120 Method for efficiently separating metal current collector of positive electrode material of waste lithium ion battery Disclosed is a method for efficiently separating a metal current collector of a positive electrode material of a waste lithium ion battery, comprising: leaching scraps using a volatile leaching agent; performing short-distance regeneration on the obtained leachate by means of rectification and the like to obtain a leaching agent, the leached mixed materials being separated aluminum foil and positive electrode powder; directly obtaining high-purity current collector metal and positive electrode powder by means of mechanical separation and cleaning; and further processing the positive electrode powder to recycle valuable elements. The leaching agent of the present invention can effective separate the current collector metal and the positive electrode powder, and obtain the high-purity current collector metal foil and positive electrode powder while reducing material loss; moreover, the leaching agent can be recycled and reused, so that secondary pollution is avoided; compared with the current processes such as high-temperature calcining/heating and high-temperature high-voltage separation, no high-temperature treatment is needed, and energy consumption is low; and compared with the existing processes such as organic soaking and alkali/acid leaching, the leaching agent consists of conventional weak acid or ammonia and/or ammonium salt, sources are extensive, the costs are low, and the efficiency is high.
12 US20190131673 Method for recycling and refreshing cathode material, refreshed cathode material and lithium ion battery Provided is a method for recycling and refreshing a cathode material, a refreshed cathode material and a lithium ion battery. The method for recycling and refreshing the cathode material includes: 1) a cathode material recycled from a waste battery is mixed with a manganiferous salt solution; 2) an alkali aqueous solution is added to the mixture to react to obtain a manganese hydroxide coating cathode material; and 3) the manganese hydroxide coating cathode material is sintered with a lithium resource to obtain a refreshed cathode material. The refreshed cathode material has no obvious impurity phase and has good crystallinity, high initial charge-discharge efficiency and good cycling performance.
13 US10189083 Method for recycling electrode materials of lithium ion batteries A method for recycling electrode materials of lithium ion batteries, including the following steps: (1) disassembling the waste lithium ion battery to get positive electrode and negative electrode, immersing the positive electrode and/or the negative electrode into ammonia, then washing by deionized water and drying the positive electrode and/or the negative electrode; (2) sintering the dried positive electrode and/or the negative electrode, and using mechanical method to separate electrode powder material from current collector to get positive electrode powder material and/or negative electrode powder material; (3) supplementing lithium to the positive electrode powder material, then processing the positive electrode powder material by milling, spray drying and sintering to obtain regenerated positive electrode material; or processing the negative electrode powder material by milling, spray drying and sintering to obtain regenerated negative electrode material. The method has advantages of energy saving, simple operation, short processing time and less pollution.
14 CN109022802 Method for recycling lithium from waste lithium ion batteries The invention discloses a method for recycling lithium from waste lithium ion batteries, and relates to the technical field of recycling of the waste lithium ion batteries. The method includes the following steps that S1, battery powder is prepared, wherein firstly, the waste lithium ion batteries are collected in a centralized manner, the collected waste lithium ion batteries are broken into small blocks through a breaker, then metal iron and stainless steel shells are selected out through a magnetic separator, meanwhile, plastic is selected out with a pneumatic separation method, metal copper and metal aluminum are screened and separated out, and the battery powder containing copper-nickel-manganese-cobalt-lithium oxides can be obtained. By means of the method for recycling lithium fromthe waste lithium ion batteries, the battery powder is more fully dissolved, the dissolution efficiency is greatly improved, it is not needed to waste a large amount of time to stir mixed liquid of the battery powder and strong acid by people, the labor intensity of people is well relieved, the working efficiency of people is improved, the battery powder and the strong acid are rapidly and conveniently dissolved, and therefore great convenience is brought for people to extract lithium ions from the waste batteries.
15 US 10,205,200 Method for recycling lithium-ion battery Provided herein is a method for recycling lithium-ion batteries in a polar solvent such as an aqueous media or water. The method disclosed herein isolates a mixture of anode and cathode materials from waste lithium-ion batteries. The separated electrode materials can easily be collected with high recovery rate, providing a rapid, efficient and low-cost method for recycling electrode materials from waste lithium-ion batteries.
16 US7192564 Method for recycling spent lithium metal polymer rechargeable batteries and related materials The method relates to a pyrometallurgical and hydrometallurgical process for the recovery and recycling of lithium and vanadium compounds from a material comprising spent rechargeable lithium batteries, particularly lithium metal gel and solid polymer electrolyte rechargeable batteries. The method involves providing a mass of the material, hardening it by cooling at a temperature below room temperature, comminuting the mass of cooled and hardened material, digesting with an acid its ashes obtained by incineration, or its solidified salts obtained by molten salt oxidation, or the comminuted mass itself, to give a mother liquor, extracting vanadium compounds from the mother liquor, separating heavy metals and aluminium therefrom, and precipitating lithium carbonate from the remaining solution.
17 US10103413 Method for removing copper and aluminum from an electrode material, and process for recycling electrode material from waste lithium-ion batteries  The present invention provides a method for removing copper and aluminum from an electrode material and a process for recycling electrode material from waste lithium-ion batteries. The method for removing copper and aluminum from the electrode material comprises: subjecting the electrode material containing electrode active material, copper and aluminum to reaction with an aqueous solution, wherein the aqueous solution has a pH value of higher than 10, and comprises base, oxidizing agent and complexing agent. The process for recycling electrode material from waste lithium-ion batteries comprises: a) harvesting an electrode material containing electrode active material, copper and aluminum from waste lithium-ion batteries; b) removing copper and aluminum from the electrode material according to the foresaid method; and c) further purifying and regenerating the electrode active material for reuse in new lithium-ion batteries. The present invention thus provides a practical and efficient method for recycling active materials from waste lithium-ion batteries.
18 CN108808151 Method for synchronously separating and recycling cobalt, lithium and manganese from cathode material of waste lithium ion battery The invention discloses a method for synchronously separating and recycling cobalt, lithium and manganese from a cathode material of a waste lithium ion battery. The method comprises the following steps of firstly, uniformly dividing a sample area of an electrolytic cell into four subareas by a polyethylene grid, respectively filling the same amount of solid powder, and slowly injecting deionizedwater into the third subarea; inoculating a sulfur oxide thiobacillus solution into the second subarea, placing the electrolyte cell after inoculating for 2 to 4 days at the room temperature, connecting the electrolyte cell and a direct-current power source through a cathode and an anode, and maintaining the electrolyte cell to run for 9 to 18 days; collecting the activated carbon, cathode precipitate and cathode liquid, so as to separate and recycle the cobalt, lithium and manganese from the cathode material of the waste lithium ion battery. The method has the advantages that the recycling process is greatly simplified, the operation is simple and convenient, the feasibility is strong, the production amount of secondary pollution waste liquid and the treatment cost in the process are reduced, and the resource and energy source are certainly saved.
19 US6261712 Method of reclaiming cathodic active material of lithium ion secondary battery  Disclosed is a method of reclaiming a cathodic active material of lithium ion secondary batteries. The lithium ion secondary battery is broken and the casing and the content are separated to remove the casing from the content. The content is dissolved into a mineral acid to separate remaining non-dissolved content from the mineral acid to obtain a liquid containing the cathodic active material represented by the formula: LiMO2, where M is a transition metal element: cobalt, nickel and manganese. A lithium salt is added to the liquid, and the cathodic active material is recovered from the liquid in the form of a mixture of lithium compound and the transition metal compound, which is calcined and reclaimed into the cathodic active material. 
20 CN108075203 Method to recycle valuable metal components in lithium-ion battery waste The invention discloses a method to recycle valuable metal components in lithium-ion battery waste. The method comprises: mixing well lithium-ion cathode and anode wastes, and performing thermal treatment at 800-1000 DEG C; grinding the sintering product, performing soaking-floatation treatment, reclaiming graphite floated up, filtering the rest solid-liquid mixture, and drying; reclaiming lithiumcarbonate from the filtrate by means of precipitating or evaporative crystallization; subjecting the solid material to electrochemical dissolution, and extracting the metal resources, nickel and cobalt. The method has the advantages that waste lithium-ion battery anode graphite is made full use as a reducing agent, the lithium resource in the anode material is reclaimed, and waste is maximally utilized; the high-value metal resources, such as nickel, cobalt and lithium, are selectively extracted, and the separation process is simple; the method rarely produces massive acidic-alkaline wastewater and is highly worthy of industrial application. 
21 CN107959080 Pretreatment method for recycling valuable elements of waste lithium-ion battery materials  The invention discloses a pretreatment method for recycling valuable elements of waste lithium-ion battery materials. The method includes the following steps of mixing the waste lithium-ion battery materials with metal oxides according to a mass ratio of (10-100):1, and calcinating the mixture in the air or inert atmosphere to obtain calcinated residues, wherein the calcination temperature is 300-900 DEG C, and the heat preservation time is 30-300 minutes; adopting an acid leaching mode for disposing the calcinated residues to recycle nickel, cobalt, manganese, aluminum and lithium. The pretreatment method can achieve environment-friendly efficient recycling of the waste battery materials, and reduce environmental pollution of lithium battery recycling. 
22 US9614261 Process for recycling electrode materials from lithium-ion batteries  Herein is disclosed a process for recycling electrode material from lithium-ion batteries, comprising harvesting a mixture of anode and cathode electrode materials from waste lithium-ion batteries, and separating the anode electrode material from the cathode electrode material by means of dense liquid separation. The mixed anode and cathode material is suspended in a liquid that has a density between those of the anode material and cathode material, such that the anode material rises to the top of the dense liquid and the cathode material sinks to the bottom of the dense liquid. The thus separated materials can easily be collected and further purified and regenerated for reuse in new lithium-ion batteries, providing an efficient and low-cost method for recycling electrode active materials from waste lithium-ion batteries. 
23 US6835228 Process of recovering valuable metals from waste secondary batteries  A process of recovering metals from waste lithium ion/Ni—H/Ni—Cd batteries, wherein the waste batteries are calcined and sieved to generate an ash containing metals and metal oxides. The process includes subjecting the ash to a first dissolution etching treatment, a first filtration treatment to obtain a filtrate containing Cd ions which are crystallized as cadmium sulfate, a second dissolution etching treatment for the filtered solid, and a second filtration treatment to obtain a second filtrate. Fe+3, Al+3 and rare earth metal ions in the second filtrate are precipitated as hydroxides by adding a base to the second filtrate. The remaining solution was extracted and counter-extracted to obtain aqueous solutions of Co and Ni ions, which were subjected separately to a electrolysis to deposit Co and Ni metals. Li ions in the residue solution from the electrolysis of Ni was precipitated as carbonate by adding a soluble carbonate salt. 
24 US8835026 Recovery and synthesis method for metaloxidic cathodic active material for lithium ion secondary battery  Disclosed are a recovery for a metaloxidic cathodic active material for a lithium ion secondary battery and a synthesis thereof by the recovery method, wherein the recovery method includes (a) dissolving a cathodic active material from a waste lithium ion secondary battery using sulfuric acid solution containing sulfurous acid gas to generate a solution containing metal ions, (b) injecting sodium hydroxide solution and ammonia solution in the solution containing the metal ions to fabricate an electrode active material precursor, and (c) filtrating the active material precursor, followed by drying and grinding, thus to fabricate a solid-state cathodic active material precursor, and the synthesis method is achieved by mixing the electrode active material precursor fabricated according to the recovery method with lithium carbonate or lithium hydroxide, followed by heat treatment, to generate a metaloxidic cathodic active material. 
25 CN107653378 Recycling method for valuable metal from waste nickel-cobalt-manganese lithium ion battery  The invention relates to a method for recycling valuable metal from a waste nickel-cobalt-manganese lithium ion battery. The method comprises the following steps of: dismounting, discharging and crushing the battery, soaking crushed waste nickel-cobalt-manganese lithium ions into sulfuric acid with certain concentration, adding a reducing agent to strip positive and negative pole pieces, and leaching valuable metals of nickel, cobalt, manganese and lithium; and replacing leach liquor with iron powder to remove copper, carrying out hydrolyzing to remove iron and aluminum, and dosing an impurity-removed solution to synthesize an aluminum coated nickel, cobalt and manganese ternary positive electrode material precursor, evaporating and concentrating the synthesized solution, adding carbonateor introducing carbon dioxide to recycle lithium. According to the method disclosed by the invention, stripping and leaching are synchronously completed, chemical precipitation is performed to removecopper, iron and aluminum, slag amount is small, slag filter performances are good, and the impurity-removed solution is used for synthesizing the aluminum coated nickel, cobalt and manganese ternaryprecursor, so that the recovery rate of valuable metal is increased; and the recovery rate for nickel, cobalt and manganese is 96% or higher in the whole process, the total recovery rate of lithium is90% or higher, the technological process is short, operation is simple, equipment is less, and the cost is low. 
26 US2017200989 Relithiation in oxidizing conditions Examples are disclosed of methods to recycle positive-electrode material of a lithium-ion battery. One example provides a method including relithiating the positive-electrode material in a solution comprising lithium ions and an oxidizing agent, and after relithiating, separating the positive-electrode material from the solution. 
27 CN107623152

Resource recycling method for waste lithium ion power battery

 The invention discloses a resource recycling method for a waste lithium ion power battery. The method comprises the following process steps: carrying out electro discharge treatment, dismantling treatment, incineration treatment, polymetallic material crushing treatment, polymetallic material acid leaching treatment, extracting treatment, sedimentation treatment, flue gas secondary combustion treatment, flue gas rapid cooling treatment, flue gas alkali spraying treatment, flue gas urea spraying treatment, flue gas adsorption treatment and the like on the waste lithium ion power battery. The resource recycling method for the waste lithium ion power battery can fully recycle valuable metals from the waste lithium ion power battery, improve the recovery and utilization rate of metal to the maximum extent, and realize the recycling of metal resources; the flue gas can be directly discharged after being subjected to the process treatments such as the secondary combustion treatment, rapid cooling treatment, alkali spraying treatment, urea spraying treatment and adsorption treatment, the environmental protection index during the process of recycling and utilization of the waste lithium ion power battery is improved, no secondary pollution is generated, cleaner production is realized, and the economic benefits and environmental benefits are significant. 
28 US9212406 Valuable metal recovery method  Provided is a method for improving the recovery rate of valuable metals such as cobalt when drying the battery waste of lithium ion batteries and the like. A second alloy excellent in terms of iron-cobalt separation performance and containing a small amount of iron is obtained by performing: a pre-oxidation step (ST20) for roasting and pre-oxidizing battery waste containing aluminium and iron; a melting step (ST21) for obtaining a molten product by melting the battery waste after the pre-oxidation step; a first slag separation step (ST22) for separating and recovering first slag containing aluminium oxide from the molten product; a second oxidation step (ST23) for oxidizing a molten first alloy after the first slag separation step; and a second slag separation step (ST24) for separating and recovering a second slag containing iron from a second alloy after the second oxidation step (ST23). 
29 CN108380036 Waste gas treatment device and method during recycle process of negative electrode materials of lithium ion battery  The invention discloses a waste gas treatment device and method during the recycle process of negative electrode materials of a lithium ion battery. The device comprises an induced draft fan, a wastegas treatment chamber, an active carbon adsorption chamber and a chimney, wherein the waste gas treatment chamber is filled with branches and leaves of vegetation; the active carbon adsorption chamberis filled with active carbons. According to the device, the waste gas passes through the branches and leaves of vegetation with better gas permeability, and it is due to the fact that the self-temperature of the waste gas can heat the branches and leaves of the vegetation, vegetation fragrance is promoted to be released to neutralize the putrid odor of the waste gas; bioactive components contained in the branches and leaves of the vegetation can react with waste gas components; in addition, moistures in the waste gas are in contact with the branches and leaves of the vegetation, after the waste gas is adsorbed and intercepted, the humidity of the waste gas can be kept to advantageously release the bioactive components, the waste gas undergoes the treatment of the waste gas treatment chamber and enters into the active carbon adsorption chamber, the odor is removed, and standardized discharge is performed on the waste gas through the chimney. 
30 CN207753130 (U) Waste lithium ion battery electrolysis fluid recovery unit  The utility model discloses a waste lithium ion battery electrolysis fluid recovery unit, including 3 electrolyte dissolvents of establishhing side by side to and and consecutive solid -liquid separation ware, filter equipment, filtrate collecting device and the vacuum distillation unit of each electrolyte dissolvent, be equipped with agitating unit in the electrolyte dissolvent, its top is equipped with the feed inlet, and the bottom is equipped with the discharge gate, and its discharge gate is connected the feed inlet of solid -liquid separation ware, the discharge gate of solid -liquid separation ware links to each other with filter equipment, filter equipment's liquid outlet then links to each other with filtrate collecting device, vacuum distillation unit is connected to filtrate collecting device's liquid outlet. The utility model provides a waste lithium ion battery electrolysis fluid recovery unit utilizes organic solvent to dissolve out respectively to carry out solid -liquidseparation behind the electrolyte to the electrolyte of realization in with waste lithium ion battery and pole piece, diaphragm material separation, thus realize separately respectively by recycle'spurpose. 
31 CN107959076 Waste lithium ion battery processing method  The invention provides a waste lithium ion battery processing method. The waste lithium ion battery processing method comprises S1, crushing battery cells to obtain crushed battery cells and volatileorganics; S2, performing low-temperature gasification and pyrolysis on the crushed battery cells to obtain pyrolysis gas and solid residues; S3, burning the pyrolysis gas and the volatile organics toobtain flue gas; S4 spraying lime milk into the flue gas for deacidification reaction to convert phosphorous acid gas inside the flue gas into calcium phosphate and fluorous acid gas into calcium fluoride; dedusting and then emitting the reacted flue gas; S5, fine-crushing and screening the solid residues to obtain powder and metal pieces; S6, recycling iron, aluminum and copper in the metal pieces; S7, acid-leaching and then filtering the powder to obtain filter liquor, and preparing precursor materials with the filter liquor. The waste lithium ion battery processing method provides a complete waste lithium ion battery processing route to recycle metal resources and meanwhile to perform harmless treatment on the organics and hazardous materials, thereby being a recycling, green and environment-friendly processing process. 
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Patent File 234 Eco- Drinking Straw

No. Patent number Title Abstract
1 CN108634745A Disposable coated paper straw The invention provides a disposable coated paper straw. The disposable coated paper straw is formed by rolling a sheet into a tubular shape, wherein the sheet is a coated paper tape made of coated paper, the coated paper comprises a paper base layer (11) and a coated layer, and the coated layer is located at least at the outer side of the paper base layer (11); the straw is provided with an interface edge (15), and the interface edge (15) is formed by splicing the overlapping portions of the two side edges of the coated paper tape in the longitudinal direction. The disposable coated paper straw not only has degradability and is conductive to environmental protection, but also can maintain the strength of the straw for a long time.
2 JP2011208040 Composition for biodegradable straw and biodegradable strawmanufactured by using the same PROBLEM TO BE SOLVED: To provide a tubular molded product that is excellent in rigidity and shape retention when softened by heating and exerts high processability.SOLUTION: A straw 1 serving as an example of the tubular molded product is composed of a biodegradable resin comprising: 50-75 wt.% of an aliphatic polyester or an aliphatic-aromatic copolyester as a first component; 15-45 wt.% of an aliphatic polyester or an aliphatic-aromatic copolyester having a flexural modulus lower than that of the first component as a second component; and 5-25 wt.% of an inorganic filler as a third component.
3 KR101984271B1 Composition for biodegradable straw and biodegradable strawmanufactured by using the same The present invention relates to a biodegradable straw composition and a biodegradable straw prepared by using the same, wherein the biodegradable straw composition includes casein and paper powder, which are natural materials, as main components, thereby providing biodegradability to minimize environmental pollution and use for a long time. Even if the shape is small, the shape of the drink can be maintained and the original taste can be felt.
4 US20150190004 Stainless steel beverage pipette A stainless steel beverage pipette, exclusively used for having a drink, has a solid body made of stainless steel. The external diameter of said solid body is 5 mm-15 mm. A through-hole is formed within the solid body. A top opening and a bottom opening with flat notch are set at both ends of said solid body. The inner and outer edges of said top and bottom openings are fitted with filleted corners, such that the cross sections of said top and bottom openings are of a semi-circular shape. The stainless steel beverage pipette is free of plasticizers ingredients, and is characterized by reusability, excellent durability and simple structure, and can thoroughly resolve the problems of the conventional plastic pipette, and improve the hygiene and food security with better applicability.
5 US20180160831 Washable straw The present invention relates to a washable straw and, more specifically, to a straw capable of being washed after being used for drinking a beverage, by sealing or opening the lateral side of a side body by circularly rolling side bodies, connected by connective joints, or an integrally formed side body. The washable straw includes: side bodies having a predetermined thickness, and formed so as to be long in the vertical direction; connective joints made of a flexible material, and allowing the side bodies to be rolled by joining the side bodies; and a detachment means provided at both of the outermost side bodies among the side bodies connected by the connective joint so as to detach both side bodies, wherein a closely adhered state in which both side bodies overlap by rolling the plurality of side bodies is maintained.
6 US20180192803 Edible straw for drink consumption The present invention relates to a straw made of an edible material for drink consumption comprising the following ingredients: water, gelling agent, sugar, a stabilising or thickening agent, and a plasticising or humectant agent. The present invention also relates to a method for obtaining the edible straw as well as to the straw obtained thereby and its use for drink consumption.
7 US20180235390 Recyclable Compostable Disposable Straws Fabricated From Rapidly Renewable Resources The invention provides improved straws, which are formed from paperboard sheets comprised of rapidly renewable resources and are recyclable, biodegradable and compostable. The paperboard sheets are comprised of bamboo, bagasse, reed or any combination or singularity thereof.
8 US20190038058 Reusable straw assembly An assembly and method for the use and cleaning of a reusable straw is provided. The assembly includes an inner and outer member which, when fitted together, form the straw. Each member has a tab at one end to inhibit the member from falling out of a dishwasher while the member is being washed. Each member includes a gap in its tubal shape. The gap runs along its longitudinal length. The gap allows for better access to its interior for cleaning and disinfecting. In operation, the inner member translates inside the outer member in preparation for use. The inner member translates out of the outer member in preparation for cleaning.
9 US20190246823 Environmentally-friendly fiber straw structure An environmentally-friendly fiber straw structure includes a straw body made of an environmentally-friendly fiber material. The straw body has an inlet and an outlet at two ends thereof and a circular section having a circular cross-section between the inlet and the outlet. From the circular section to the outlet forms a first tapered section at a first inclination so that the outlet has an approximately elliptical shape. When in use, the mouth of a user sucks the outlet of the straw body for drinking a beverage, the first tapered section corresponds in shape to the mouth, thereby avoiding rotation of the straw body, reducing a gap between the mouth and the straw body.
10 US20190307274 Paper straw A paper straw for drinks is revealed. The paper straw includes a base material formed by a paper strip made from calcium carbonate. The base material is wound around an axis of a roller shaft obliquely and overlapped to form a hollow spiral tube whose two ends are communicated. Overlapped portions one over the other on the base material of the spiral tube are tightly connected. The paper straw that is environmentally sustainable, degradable and convenient to use can replace the plastic straw. The paper straw has premium quality and high performance.
11 US20190313819 Paper Drinking Straw A paper drinking straw is provided with an elongated member of paper having two short sides and two long sides wherein one long side includes a first joining strip and the other long side includes a second joining strip; a piercing segment at a position of the first joining strip superimposed on the second joining strip; and a cutting segment at one short side and including a first cutting edge connected to one long side, a second cutting edge connected to the first cutting edge and inward inclined relative to the first cutting edge, a third cutting edge connected to the second cutting edge and outward inclined relative to the first cutting edge, and a fourth cutting edge interconnected to the third cutting edge and the other long side. The first joining strip is superimposed on the second joining strip and secured thereto to form the paper drinking straw.
12 US20190343312 Plastic tipped biodegradable straw A straw includes a body having a tube shape with an open top end and an open bottom end leading into the hollow tube. The body is made of a biodegradable paper material. The straw further includes a tip having a tube shape with a top portion having an open top end and a bottom portion having an open bottom end both leading into the hollow tube. An adjustable portion is disposed between the top portion and the bottom portion. The tip is made of a plastic material. The open bottom end of the tip is coupled to the open top end of the body, fluidly connecting the body 16 to the tip.
13 US20190380520 Disposable coated paper straw The invention provides a disposable coated paper straw formed by rolling one or more sheets. In the straw each one of the one or more sheets is a coated paper strip made of a coated paper which comprises a first paper-base layer and a first coating layer. The first coating layer is located at least at an exterior side of the first paper-base layer. The straw further contains an interface edge which is joined by overlapping portions of the one or more sheets in the longitudinal direction. The first coating layer is made from degradable resin. The straw provided by the present invention is not only degradable, which is environmentally friendly, but also it can maintain the strength of the straw over a long period of time.
14 US20200000259 Three-layer composite paper straw and method for producing the same A three-layer composite paper straw and a method for producing the same are revealed. Basically the paper straw is made from composite paper with three layers of composite paper spirally wound and adhered in a staggered and overlapping manner. A first layer of paper, a second layer of paper and a third layer of paper of the three layers of composite paper form the outermost layer, the intermediate layer and the inner layer of the paper straw respectively. The first and the third layers of paper are stone paper while the second layer of paper is long fiber pulp paper. The three layers of paper are stacked on top of one another in turn with the long side thereof overlapping like tiles and then adhered to one another. The paper straw is eco-friendly, recyclable, with good structure strength and easy to produce.
15 US20200009759 Method for making wooden straws and molding set for making the wooden straws A method for making wooden straws from a solid wood stick includes a step of providing a solid wood stick; a step of clamping the solid wood stick by a molding set, and two ends of the solid wood stick protruding beyond the molding set, and a step of drilling an axial passage through the solid wood stick by at least one machining unit to form a wooden straw. The wooden straws are bio-degradable and durable. The wooden straws do not affect beverage taste and can be manufactured in mass production. The molding set for making the wooden straws includes two dies and each die includes a groove. The solid wood stick is accommodated in the two respective grooves. At least one machining unit is used to drill an axial passage through the solid wood stick to form the wooden straw.
16 US20200015612 Biodegradable drinking straw A biodegradable drinking straw is made of plant fiber powder and at least one polymer. The at least one polymer is polylactide (PLA), polybutylene succinate (PBS), or polypropylene (PP). As an alternative of drinking straws made of traditional plastic materials, the biodegradable drinking straw when buried in landfills can be degraded by microorganisms and decay, eventually becoming a part of the nature again. Besides, the biodegradable drinking straw is made of neither non-petrochemical materials nor silica, so its production avoids excessively consuming the finite resources, thereby being contributive to energy conservation and environmental protection.
17 US20200022516 PAPER STRAW AND METHOD FOR MAKING THE SAME A method for making a paper straw and includes a step of applying anti-bacterial and water-proof layer to both sides of a paper sheet; a step of flatting or scrolling the paper sheet to be round and tubular, and two sides of each paper sheet being overlapped to each other; a step of pressing and adhering the overlapped portion to form initial type of a paper straw; a step of drying the initial type of the paper straw to solidify the water-proof layer, and a step of cutting the initial type of the paper straw into multiple sections. The paper straw of the present invention is anti-bacterial, water-proof and is not deformed in liquid or beverage.
18 US8579148 Cover and straw for use with a container A reusable straw includes a first part having a hollow elongated body that has a first end and an opposing second end and a second part having a hollow elongated body that has a first end and an opposing second end. The second part has a width that allows the first part to be received within a hollow interior of the first part. A first coupling member is formed along an inner surface of the first part proximate the first end; and a second coupling member is formed along an outer surface of the second part at the first end thereof. The first and second coupling members mate together to securely and sealingly couple the second part to the first part. The first coupling member is either a male member or a female member and the second coupling member is complementary and is the opposite member.
19 US8915454 Drinking straws having environmentally-friendly wrappers and methods therefor A drinking straw includes a tube having an upper end including a first opening, a lower end including a second opening, and an outer wall extending between the upper and lower ends. A wrapper covers the tube and a securing element permanently attaches the wrapper to the outer wall of the tube. The wrapper is adapted to be opened for exposing the first and second openings of the tube while the securing element maintains the attachment of the wrapper to the tube. The outer wall of the tube has an inner surface, whereby at least two opposing sections of the inner surface of the outer wall are joined together for forming a bifurcated opening adjacent an end of the tube. The bifurcated opening defines a total area that is smaller than the area of the opening at the opposite end of the tube.

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Patent File 235 Cannabis Extraction

No. Patent number Title Abstract
1 US 10,195,159 Processes and apparatus for extraction of active substances and enriched extracts from natural products Processes for preparing extracts of natural products such as plant material, and for preparing purified extracts from crude extracts of natural products, by extraction with hot gas. Apparatus suitable for use in preparing extracts of natural products are also described.
2 US 10,555,928 Cannabis extracts and methods of preparing and using same The invention relates to the extraction of pharmaceutically active components from plant materials, and more particularly to the preparation of a botanical drug substance (BDS) for incorporation in to a medicament. It also relates to a BDS, for use in pharmaceutical formulations. In particular it relates to BDS comprising cannabinoids obtained by extraction from cannabis.
3 US 10,716,819 Food grade cannabis extracts and methods for their preparation Food grade cannabis extracts and methods for their preparation that may reduce or eliminate the anxiety effect that cannabis may have on a user. Embodiments of the methods include providing raw botanical material; providing food grade glycerin; combining the botanical material with the glycerin; blending the botanical material and the glycerin to achieve a homogenous mixture; optionally pre-heating the mixture prior to being agitated; placing the mixture in a sealable container; providing an agitator; securing the container on or within the agitator, agitating the mixture and allowing the mixture to rest at various intervals; heating the mixture and allowing the mixture to cool at various intervals; straining the mixture; pressing the mixture; and then filtering the mixture to remove any remaining particulates to thereby produce a food grade cannabis extract suitable for at least medical use.
4 US 10,737,198 Cannabis products modified by removing volatile organic compounds and adding volatile unsaturated hydrocarbons Purified and modified Cannabis products and methods for producing the same. The purified Cannabis product comprises substantially no volatile organic compounds while retaining Total Potential cannabinoid content. The modified Cannabis product comprises a purified Cannabis product modified by at least one added volatile unsaturated hydrocarbon. The modified Cannabis product is formed by extracting a volatile organic compound from a Cannabis raw material to form a purified Cannabis product, and then adding the at least one volatile unsaturated hydrocarbon to the purified Cannabis product to form the modified Cannabis product and cause an enhanced user experience during combustion and inhalation of the modified Cannabis product
5 US 10,919,828 Process for manufacturing cannabidiol process for producing cannabidiol from hemp and cannabis plants is disclosed. The steps of the process include the steps of: plant conditioning and size reduction, infusing with an extraction agent, separating a solid biomass and a liquid phase, treating the liquid phase with a removal agent, decarboxylation, removal of impurities; and color removal. The resulting cannabidiol conversion efficiency is over 90% and a TCH content within the legal limits for commercial cannabidiol.
6 US 10,940,173 Cannabis oil extracts and compositions The present invention provides cannabis oil extracts and compositions thereof, including cannabis oil compositions containing vitamin E, and methods for preparing the extracts and compositions. In some embodiments, the present invention provides a method for preparing a cannabis oil extract comprising eluting cannabinoids from cannabis plant material with a solvent to produce an eluate, filtering the eluate with a filter to produce a filtrate, evaporating the solvent from the filtrate with a distiller to produce a distillate, and purging the distillate under conditions sufficient to remove residual solvent, thereby preparing the extract. In some embodiments, the method further includes mixing a quantity of vitamin E with the extract to produce a cannabis oil composition.
7 US 11,021,675 Process for producing refined oils from botanical plant matter using a supercritical fluid An improved process for producing refined oils free of contaminating waxes, resins, and lipids from botanical plant matter using an improved in-line winterization process is disclosed. The biomass is fed into an extraction vessel where the oils are extracted using a solvent, followed by a two-stage separation. Both the temperature and pressure of the solvent going into the separators are controlled for effective separation. Additional solvent is added to enhance the separation efficiency between the refined oil and the undesired fraction containing the contaminants. This process provides an alternative to current wax mitigation techniques, such as alcohol based solvent winterization.
8 US 11,027,218 Purification and separation techniques for cannabinoids This disclosure relates to techniques and methods to isolate and purify cannabinoids, such as CBDV, CBD, CBC, THCV, THC, CBN, CBG, CBDA, THCA, or CBGA. Evaporation and sonicating techniques are used to isolate and purify cannabinoids, such as CBDV, CBD, CBC, THCV, THC, CBN, CBG, CBDA, THCA, or CBGA. The resulting compounds find further use within the devices and compositions described herein as well as for preparative and analytical methods.
9 US 7,700,368 Methods of purifying cannabinoids from plant material The invention relates to methods of preparing cannabinoids in substantially pure form starting from plant material. Also described are substantially pure preparations of various cannabinoids and cannabinoid acids, and also extracts enriched in cannabinoids and cannabinoid acids.
10 US 9,066,910 Methods and compositions of cannabis extracts In one embodiment, a method is provided for obtaining an extract from a cannabis plant for medical uses. In one embodiment, a method for obtaining an extract from a cannabis plant for medical uses is provided. The method comprises (a) providing cannabis flower trimmings with trichome material, (b) providing clean, cold water to at least cover cannabis the cannabis flower trimmings, (c) agitating the mixture of cannabis flower trimmings and water (d) soaking the cannabis flower trimming in cold water for at least one minute, (e) removing cannabis flower trimmings from the water, (f) removing the trichome material from the water and (g) drying the trichome material to contain no more than 10% total water weight.
11 US 9,730,911 Cannabis extracts and methods of preparing and using same The invention relates to the extraction of pharmaceutically active components from plant materials, and more particularly to the preparation of a botanical drug substance (BDS) for incorporation in to a medicament. It also relates to a BDS, for use in pharmaceutical formulations. In particular it relates to BDS comprising cannabinoids obtained by extraction from cannabis.
12 CN 110,950,741 Industrial Cannabis sativa l. extraction and purification preparation method The invention discloses an industrial cannabis sativa l. extraction and purification preparation method. The method comprises the following steps: step 1, taking 1/3 or more of leaves at the upper endof an industrial cannabis sativa l. plant; step 2, heating an industrial cannabis sativa l. CBD extracting solution obtained in the step 1; step 3, refrigerating the saturated CBD extracting solutionobtained in the step 2; step 4, refining a CBD extracting solution desolventized in the step 3, and removing tetrahydrocannabinol and part of impurities in crude oil by adopting a chromatographic separation technology; and step 5, crystallizing the CBD extracting solution refined in the step 4 to obtain a CBD solid. According to the industrial cannabis sativa l. extraction and purification preparation method, CBD purification can be effectively achieved through the arrangement of the first step to the fifth step, and compared with a multi-concentration mode adopted in the prior art, the method does not need of repeated heating, can effectively save energy, and is in favor of energy conservation and environmental protection.
13 CA 3,107,888 Cold extraction method for cannabinoids and terpenes from cannabis by polyunsaturated lipid-based solvents The invention relates to methods for producing botanical extracts comprising cannabinoids and terpenes using cold extraction with highly polyunsaturated lipid solvents. These methods allow for the extraction of cannabinoids and terpenes while leaving behind impurities that are commonly found in organic solvent extraction methods.
14 US 10,376,551 Method for conducing concentrated cannabis oil to be stable, emulsifiable and flavorless for use in hot beverages and resulting powderized cannabis oil A method for producing powderized cannabis oil, and the resulting powderized cannabis oil, in which concentrated cannabis oil is mixed with and absorbed by a modified starch powder, preferably maltodextrin, in a ratio of at least three grams of starch powder for every one-eighth of a gram of cannabis oil is disclosed. Further disclosed are beverages, baked goods and single-serve beverage brewing cartridges utilizing or incorporating the powderized cannabis oil to create human-consumable products that contain an emulsified, tasteless, and odorless dose of cannabis oil.