879results about "Lithium oxides/hydroxides" patented technology

A process and apparatus for lithium ion extraction. The process includes passing a lithium-containing brine through a lithium-adsorbent, then passing a desorption media through the lithium-adsorbent at a temperature above 40℃ to produce a lithium-enriched eluent. The lithium concentration of the eluent is further increased by passing it through a nanofiltration membrane and a reverse osmosis membrane. Preferably, the eluent is passed through these membranes more than once at a temperature above 40℃. The process is energy-efficient, because it is conducted entirely at temperatures above 40℃. Accordingly, there is no need to decrease the temperature of the lithium-enriched eluent before passing it through the nanofiltration membrane and the reverse osmosis membrane. Moreover, there is no need to increase the temperature of the nanofiltration reverse osmosis permeate before passing it through the lithium-adsorbent as a desorption media, nor is there a need to increase the temperature of the enriched lithium stream before lithium precipitation.

The present disclosure relates to the extraction of lithium from underground reservoirs of naturally occurring brines. Described herein are systems and methods to extract lithium entrapped within reservoirs that were previously inaccessible.

The present disclosure relates to the extraction of lithium from liquid resources such as natural and synthetic brines, leachate solutions from clays and minerals, and recycled products.

The invention discloses a production process of high-purity lithium oxide, and relates to the technical field of lithium oxide preparation. The production process of the high-purity lithium oxide comprises the following steps: mixing lithium hydroxide and hydrogen peroxide with the mass concentration of 90-99%, and carrying out peroxidation reaction to obtain a mixture containing lithium peroxide and lithium hydroxide; carrying out solid-liquid separation on the mixture containing the lithium peroxide and the lithium hydroxide to obtain a supernatant containing the lithium hydroxide and a solid containing the lithium peroxide; and carrying out drying treatment on the supernatant containing the lithium hydroxide to obtain the recycled lithium hydroxide, and carrying out thermal decomposition on the solid containing lithium peroxide in an inert gas protective atmosphere to obtain the high-purity lithium oxide powder. According to the technical scheme, the high-purity lithium oxide is prepared by adopting a process of peroxidizing lithium hydroxide into lithium peroxide and then carrying out thermal decomposition, the powder can be obtained without grinding, and the method has the advantages of high production efficiency, low energy consumption and high raw material utilization rate.

The invention relates to the technical field of lithium iron phosphate black powder recovery, in particular to a method for preparing iron phosphate and lithium hydroxide by electrochemically and selectively recovering waste lithium iron phosphate. The method comprises the following steps: separating an anode chamber and a cathode chamber through a cation selective permeable membrane, respectively adding electrolyte into the anode chamber and the cathode chamber, electrolyzing for a period of time to respectively form an acidic environment and an alkaline environment, adding lithium iron phosphate black powder into the anode chamber, selectively leaching lithium into a solution within a proper pH range, and migrating the lithium into the cathode chamber under the action of an electric field, and iron is retained in the solid in the form of iron phosphate, so that lithium-iron separation and lithium ion enrichment can be realized in the leaching process. According to the method, the leaching rate of lithium can reach 99% or above, the leaching rate of iron is kept below 0.01%, the phosphorus iron slag can be restored into an iron phosphate precursor after being calcined, and the enriched lithium liquid is recycled in a high-purity lithium hydroxide form after being evaporated and concentrated. According to the method, electrons are used as a green oxidizing agent, the use of acid and alkali is greatly reduced in the leaching process, and all components are recycled.

To provide a method which enables inexpensive production with a high yield of lithium hydroxide with a low amount of impurities such as sodium from lithium-containing water including a lithium ion and a chloride ion.SOLUTION: A production method of lithium hydroxide includes: a crystallizing step of crystallizing lithium hydroxide (LiOH) from lithium-containing water including a lithium ion and a chloride ion; a solid-liquid separation step of performing solid-liquid separation treatment of concentrated liquid including the LiOH to obtain the LiOH as a solid product and filtrate; a carbonation step of producing lithium carbonate from the filtrate by carbonation; a lithium carbonate recovery step of evaporating at least a part of ammonia from a mixed liquid obtained in the carbonation step and performing solid-liquid separation treatment of the resultant treated liquid to obtain lithium carbonate as a solid product; a lithium hydroxide production step of converting the obtained lithium carbonate into LiOH followed by solid-liquid separation treatment to obtain an aqueous LiOH solution (1) as a liquid component; and a recrystallizing step of crystallizing LiOH from the aqueous solution (1).SELECTED DRAWING: Figure 2

A process for recovering materials from a black mass material obtained from lithium-ion batteries can include: i) conveying a black mass material as a black mass solid stream; ii) leaching the black mass solid stream to form a pregnant leach solution and residual solids; iii) separating the pregnant leach solution from the residual solids; iv) isolating a copper product from the pregnant leach solution; v) isolating an aluminum (Al) and / or iron (Fe) product from the pregnant leach solution; vi) isolating a manganese (Mn) product from the from the pregnant leach solution; vii) isolating a cobalt (Co) product from the from the pregnant leach solution; viii) isolating a nickel (Ni) product from the from the pregnant leach solution; ix) isolating a salt by-product from the pregnant leach solution; and x) isolating a lithium product the pregnant leach solution.

The invention provides a lithium supplement agent, and belongs to the technical field of energy storage, the lithium supplement agent comprises a lithium-rich lithium ferrite material and a coating layer coating the surface of the lithium-rich lithium ferrite material, and the material of the coating layer comprises lithium pyrophosphate. According to the invention, the technical problems of poor air stability, relatively poor safety and the like of the lithium-rich positive electrode material in the related technology can be solved, so that lithium can be effectively supplemented.

The invention relates to a method for simultaneously preparing lithium hydroxide and sulfuric acid. The invention provides a method for simultaneously preparing lithium hydroxide and sulfuric acid, which comprises the following steps: preparing a bipolar membrane electrodialysis device which comprises a first bipolar membrane, an anion exchange membrane, a cation exchange membrane and a second bipolar membrane, and forming an acid chamber between the first bipolar membrane and the anion exchange membrane, a salt chamber is formed between the anion exchange membrane and the cation exchange membrane, and an alkali chamber is formed between the cation exchange membrane and the second bipolar membrane; a lithium sulfate aqueous solution is added into a salt chamber of the bipolar membrane electrodialysis device, a sulfuric acid aqueous solution is added into an acid chamber, and a lithium hydroxide aqueous solution is added into an alkali chamber; and discharging the desalted solution formed in the salt chamber of the bipolar membrane electrodialysis device, discharging the sulfuric acid aqueous solution formed in the acid chamber, and discharging the lithium hydroxide aqueous solution formed in the alkali chamber.

A recycling method of a waste lithium ion secondary battery may include (a) charging a waste lithium ion secondary battery into a pyrolysis furnace, (b) increasing the internal temperature of the pyrolysis furnace to induce self-heating of the waste lithium ion secondary battery, (c) maintaining a self-heating reaction of the waste lithium ion secondary battery, (d) discharging a first powder formed after completing the self-heating reaction of the waste lithium ion secondary battery, and (e) injecting the first powder into water, dissolving a lithium component included in the first powder, and separating and recovering a lithium aqueous solution, a precipitate settled in the lithium aqueous solution, and a floating material on the surface of the lithium aqueous solution, separately.

The invention relates to the electrochemical production of hydrogen and lithium hydroxide from Li+-containing water using a LiSICon membrane. The objective is to provide a process that can be operated economically on an industrial scale. In particular, the process should exhibit high energy efficiency and achieve a long membrane service life even when the feed contains impurities that are detrimental to LiSICon materials. A special aspect of the process is that the lithium is selectively separated by the membrane and water is electrolyzed simultaneously within the cell. A key aspect of the process is that the electrochemical process is carried out in an alkaline environment, specifically at pH 9 to 13. The pH value is adjusted by adding an alkaline compound to the feed.

The invention discloses a preparation method of battery-grade lithium hydroxide monohydrate, which comprises the following steps: causticizing a lithium sulfate concentrated solution, freezing and crystallizing to obtain a frozen solution, precisely filtering the frozen solution, filtering by adopting an alkali-resistant nanofiltration membrane, collecting a penetrating fluid, and when the permeability of the alkali-resistant nanofiltration membrane is reduced, filtering by adopting an alkali-resistant nanofiltration membrane to obtain the battery-grade lithium hydroxide monohydrate. The alkali-resistant nanofiltration membrane is cleaned by lithium bicarbonate thermal decomposition mother liquor of a lithium carbonate production line, and all collected penetrating fluid is subjected to evaporative crystallization and centrifugal drying to obtain the battery-grade lithium hydroxide monohydrate. By adopting a method of nanofiltration membrane impurity removal and primary evaporative crystallization, the nanofiltration membrane impurity removal is used for replacing the primary evaporative crystallization in the prior art, so that the energy consumption can be effectively reduced, the production cost is saved, the Si content of the nanofiltration solution is lower than 3ppm and lower than that of the primary evaporative crystallization heavy solution, and the method can be used for preparing high-quality battery-grade lithium carbonate. The Si content of the prepared lithium carbonate is lower than 20 ppm.

The invention belongs to the field of waste resource recovery treatment, and provides a method for combined recovery of lithium iron phosphate and ternary battery powder, which comprises the following steps: mixing and grinding decommissioned lithium iron phosphate and ternary battery powder, partially oxidizing lithium iron phosphate, then carrying out acid leaching, adding an oxidizing agent and a specific oxidation accelerator La2O3-LaF3 in the leaching process, and carrying out acid leaching to obtain lithium iron phosphate and ternary battery powder; carrying out heating reaction on the obtained leached slurry to obtain a lithium extraction solution, and then removing impurities to obtain a pure lithium solution; the impurity removal comprises the following steps: removing fluorine by using lanthanum salt to obtain lanthanum fluoride slag, and recycling the obtained lanthanum fluoride slag as an oxidation accelerant. Lithium iron phosphate is partially oxidized into more stable iron phosphate and lithium oxide by utilizing the oxidability of ternary battery powder, complete oxidation of lithium iron phosphate is effectively promoted by matching with an oxidation accelerator La2O3-LaF3 selected in the acid leaching process, use of hydrogen peroxide is avoided, LaF3 can be regenerated for use through the rear-end comprehensive impurity removal process, the resource utilization rate is increased, and the production cost is reduced. And the economic cost is reduced.

The invention discloses a method for preparing a battery-grade lithium compound. The method comprises the following steps: S1, carrying out sulfuric acid acidification reaction on a lithium-containing raw material or roasting by adding sulfate, and carrying out water leaching to obtain leached slurry; the lithium-containing raw material is a lithium mineral or a waste lithium battery material; s2, calcium oxide or calcium hydroxide is added into the leaching slurry, filtering is performed after full reaction, filtrate A and filter residues A are obtained, the main component of the filtrate A is lithium hydroxide, and the filtrate A further comprises soluble impurities formed after water leaching; s3, adding a substance for removing calcium ions into the filtrate A, fully reacting, and filtering to obtain filtrate B and filter residues B; s4, fully contacting the filtrate B with an extracting agent for extraction, and then separating to obtain a loaded organic phase and raffinate; s5, reversely extracting the loaded organic phase to obtain a lithium solution and a blank organic phase; and S6, further treating the lithium solution to obtain the battery-grade lithium compound. Sodium ions are basically not introduced, the energy consumption is low, the process is simplified, the product quality is high, the production cost is low, the lithium yield is high, and byproducts are convenient to treat.

The invention discloses a double-metal gradient diffusion layer modified high-nickel ternary positive electrode material and a preparation method thereof. The preparation method comprises the following steps: filtering and uniformly dispersing high-nickel ternary positive electrode material powder; introducing inert gas into the atomic layer deposition system, and raising the temperature to a target temperature; respectively preheating the metal precursors A and B to proper temperatures; the preparation method comprises the following steps: sequentially introducing a metal precursor A, precursor water, a metal precursor B and precursor water into a reaction chamber, alternately depositing according to a pulse-reaction-purging sequence, and repeatedly circulating the process to obtain the bimetallic oxide coated high-nickel ternary positive electrode material, and post-annealing treatment. According to the bimetal gradient diffusion layer modified high-nickel ternary positive electrode material prepared by the preparation method disclosed by the invention, the lithium storage performance of the high-nickel ternary material is greatly improved, excellent cycling stability and rate capability are obtained, the coating layer is accurate and controllable, the preparation process is simple, meanwhile, large-batch production can be realized, and relatively high application value is achieved.

Process for the manufacture of a fluoride doped cathode active material wherein said process comprises the steps of (a) providing a particulate oxide or (oxy)hydroxide or carbonate of TM wherein TM comprises nickel and manganese and wherein at least 50 mol-% of TM is manganese, wherein said particulate oxide or (oxy)hydroxide has an average particle diameter (D50) in the range of from 1 to 16 pm, (b) providing a source of lithium that contains 0.01 to 2.5 up by weight of fluoride, uniformly dispersed within said source of lithium, (c) mixing said oxide or (oxy)hydroxide or carbonate of TM with said fluoride-containing source of lithium and, optionally, with additional source of lithium containing less fluoride, and, optionally, with one or more dopants based on at least one metal other than lithium, (d) treating the mixture obtained from step (c) thermally.

The present disclosure provides a method of recovering a spent battery cathode material comprising lithium and at least one of nickel, cobalt and / or manganese, the method comprising: heating the spent battery cathode material in a reducing atmosphere to form a heat-treated spent battery cathode material comprising LiF and one or more of LijO, LiOH and LijCOs; washing the heat treated waste battery cathode material in an aqueous solvent to extract lithium-containing species and fluorine-containing species wherein the aqueous solvent is free of alkaline earth metal hydroxides or other species intended to reduce or prevent soluble fluorine species from remaining dissolved in the aqueous solvent; separating an aqueous solvent comprising lithium and fluorine species from the heat treated waste battery material; after separating an aqueous solvent comprising lithium and fluorine species from the heat-treated waste battery material, treating the aqueous solvent to separate lithium species from fluorine species; recycling a lithium substance in the form of lithium hydroxide or lithium carbonate; forming an acidic aqueous recovery feed comprising one or more of nickel, cobalt and / or manganese by leaching the heat treated waste battery cathode material with a mineral acid after the step of separating the aqueous solvent from the heat treated waste battery material; and recovering one or more of nickel, cobalt and / or manganese from the acidic aqueous recovery feed by a further process step selected from one or more of solvent extraction, solid phase extraction, electrochemical extraction and precipitation processes.

In a method for regenerating a lithium precursor, an electrode active material mixture collected from a lithium secondary battery is prepared. The electrode active material mixture is reduced in a dry rotary heating reactor to form a preliminary precursor mixture. A lithium precursor is selectively recovered from the preliminary precursor mixture. Recovery yield and selectivity can be improved using the dry rotary heating reactor.

The present invention provides a method for producing lithium hydroxide, comprising the steps of reacting lithium carbonate and calcium hydroxide in a liquid to obtain a solution containing lithium hydroxide, and performing solid-liquid separation on the solution into a liquid component containing lithium hydroxide and a solid component containing lithium derived from the lithium carbonate, and recovering lithium hydroxide from the liquid component.

The invention provides a preparation method of battery-grade lithium salt, and relates to the technical field of new energy materials. Starting from battery-grade lithium sulfate, part of lithium sulfate is reduced under hydrogen to obtain battery-grade lithium sulfide; part of lithium sulfate reacts with sodium carbonate to obtain battery-grade lithium carbonate, the battery-grade lithium carbonate reacts with hydrochloric acid to obtain lithium chloride, lithium chloride is electrolyzed to obtain metal lithium, and the metal lithium reacts with sulfur, is reduced and is converted into battery-grade lithium sulfide; part of lithium sulfate reacts with sodium hydroxide to obtain battery-grade lithium hydroxide, and then the battery-grade lithium hydroxide reacts with hydrogenation tail gas to obtain battery-grade lithium sulfide. Further, the battery-grade lithium sulfide can be obtained from the lithium-containing ore through the steps of calcination, sulfuric acid leaching, purification and the like. Through conversion and adjustment among different lithium salts, the cost of the lithium sulfide can be adjusted according to different conditions, and low-cost and large-scale mass production of the lithium sulfide is realized.

The present disclosure provides various characteristics for treating tail brine extracted from a bromine plant, when said brine contains residual bromine and chlorine with low pH and high ORP values that will be used in a lithium extraction production facility. The method conditions the extracted tail brine by adding either sodium hydroxide or ammonium hydroxide to bring its pH levels to between 5.5 and 6.5. The conditioned tail brine then gets pre-treated with hydrazine in either less than 70 ppm if used in combination with sodium hydroxide; or 195 ppm if used with ammonium hydroxide until the ORP levels have reached to below 100 mV. The extracted tail brine is then processed through DLE processing device having four groups of adsorption columns filled with lithium adsorption resins that, after treating the extracted tail brine, discharges the raw eluate solution to an effluent tail brine tank using an effluent tail brine pump connected to the DLE processing device.

The disclosed subject matter relates to solid state lithium ion conductors and batteries (such as pseudo solid state and all solid state batteries), and methods of making and use thereof. For example, disclosed herein are solid state lithium ion conductors comprising: Li3+2x+yzM [III+z]X6-x-yNxOy, wherein M is an alkali metal, an alkaline earth metal, a transition metal, a post transition metal, or a combination thereof; X is a halide; x is from 0 to 6; y is from 0 to 6; z is from -2 to 2; and [III+z] represents the valence of the M-ion(s); with the proviso that: M is not Li; 0 < x + y ≤ 6; and 0 < (3+2z+y-z) ≤ 6. Also disclosed herein are methods of making and use of any of the solid state lithium ion conductors disclosed herein, for example in devices such as a solid state battery.

This invention generally relates to a process and circuit for the selective adsorption and desorption of lithium from natural and synthetic multivalent salt solutions, such as sulfate-containing solutions, using a LADH lithium selective adsorbent in a CCAD process and circuit. During the CCAD process, lithium ions load selectively and in high capacity into the LADH lithium selective adsorbent from feedstock solutions heavy in salts of both monovalent and multivalent anions. The inventive CCAD process / circuit displaces the high multivalent salt-containing feedstock solution with a strong monovalent salt solution to initiate a metathesis reaction of bound multivalent salts. The inventive process / circuit then deintercalates the formed LiCl from the LADH lithium selective adsorbent with water or a dilute salt solution.

A waste battery processing method includes a discharging process of discharging a waste battery, a dismantling process of dismantling the discharged waste battery into battery cell units, a shredding process of shredding the dismantled waste battery, a roasting process of roasting the shredded waste battery, a pulverizing process of pulverizing the fired waste battery, and a hydrometallurgical process of extracting and recovering metals from the pulverized waste battery.

The invention belongs to the technical field of lithium ion batteries, and particularly relates to a composite positive electrode material for a lithium ion battery and a preparation method of the composite positive electrode material. The composite positive electrode material is composed of a positive electrode base material, a lithium supplementing material and a catalytic material. The preparation method comprises the following steps: (1) preparing a composite material of the positive electrode base material and the lithium supplementing material in situ; and (2) dispersing the catalytic material on the surface of the composite material of the positive electrode base material and the lithium supplementing material, and forming a stable interface layer between the catalytic material and the lithium supplementing material. According to the method disclosed by the invention, the lithium supplementing material has double functions of surface modification of a positive electrode base material and lithium supplementing of a negative electrode, and meanwhile, the first effect and the cycling stability of the battery are improved; a catalytic material is introduced to the surface of the lithium supplementing material, free O generated by the lithium supplementing material Li is fixed in situ, the bag expansion phenomenon of the battery is relieved, and the cycling stability and safety of the battery are further improved; the preparation process is simple, raw materials are cheap and easy to obtain, the production cost is low, and industrial production and popularization are easy.

The present disclosure introduces advanced techniques for critical mineral processing using solid electrolyte membranes. In particular, a novel electrolytic and environmental direct lithium extraction (MOBILE) process, may be used comprising an extractor unit featuring alternating lithium and sodium storage modules, a lithium collection tank, and a precipitation stage. The MOBILE process offers several key advantages over traditional methods, including enabling selective lithium extraction from low-concentration feed solutions while reducing chemical consumption and minimizing environmental impact. Furthermore, the MOBILE process demonstrates faster extraction times and superior adaptability to diverse feed solution compositions. Its modular and scalable design allows for flexible adaptation to various feed solutions and production capacities, making it a versatile solution for lithium extraction across different scenarios. The MOBILE process represents a significant advancement in critical mineral processing, offering a more efficient, environmentally friendly, and adaptable method for lithium extraction and related mineral processing applications.

A process (1000) for producing a lithium salt (190) by treating a particulate lithium containing material containing lithium bearing minerals comprising pressure leaching (20) the lithium containing material with concentrated sulphuric acid to form a pregnant solution (22) containing lithium sulphate as a source of lithium for a selected lithium salt for production (190) and impurities; removing the impurities in a series of steps (30, 40, 50, 60, 70) including removal (70) of at least one sulphate compound contained in the pregnant solution, said at least one sulphate compound containing at least one of potassium and sodium; and producing the selected lithium salt (190) following impurity removal (30, 40, 50, 60, 70).

Black mass from disused lithium batteries is leached for recovery of various metals in a process that includes precipitation, solvent exchange, ion exchange, and salt splitting to create multiple product streams for recovery of pure value products. Most typically, the process is a closed-loop process and allows for production of metallic cobalt and nickel, EMD, and a high purity lithium hydroxide or carbonate product with minimal generation of waste streams.

A method for recovering lithium from waste lithium ion batteries includes: dissolving active material powder obtained by pre-processing the waste lithium ion batteries in a mineral acid to obtain a solution; neutralizing the solution with lithium hydroxide; re-adding lithium hydroxide to the acid solution to which lithium hydroxide has been added and filtering precipitates to obtain a first lithium salt aqueous solution as a filtrate; and subjecting the first lithium salt aqueous solution to membrane electrolysis using an ion exchange membrane to obtain a lithium hydroxide aqueous solution, an acid, and a second lithium salt aqueous solution that is more dilute than the first lithium salt aqueous solution, and the lithium hydroxide aqueous solution obtained is reused in the neutralization step and / or the lithium hydroxide re-addition step, and the acid obtained is reused as the mineral acid used in the dissolution step.

The application discloses a method for selectively extracting metals from waste ternary lithium batteries by using a eutectic solvent. The method uses a eutectic solvent DES synthesized by choline chloride and oxalic acid as an extraction agent, quotes dimethyl sulfoxide DMSO and water as diluents, introduces a circulation and extraction step on the basis of metal element series immersion, i.e. extracts lithium oxalate from the leaching solution with ethanol and recycles the DES by fractional distillation, and makes innovations in recycling of metal lithium and recycling of the DES. The application has the advantages of high efficiency extraction, high precision purification, innovative extraction of lithium element and innovative recovery of the reagent DES.