686results 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 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.

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 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.

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.

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 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.

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.

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.

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.

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.

A versatile and efficient method is described for recovering a high-purity material (target) or multiple materials (targets) from a complex mixture in batch or continuous chromatography systems. If perfectly selective sorbents are available for the targets, constant-pattern batch capture methods in tandem or tandem carousel capture methods are preferred. If perfectly selective sorbents for the targets are unavailable, the batch capture, carousel capture, isocratic SMB, non-isocratic SMB, and isotachic displacement methods can be deployed in tandem or in parallel to produce high purity products with high yields and high productivity.

A method of preparing a cathode active material composition involves combining a first cathode active material including recycled lithium 40 with a second cathode active material 41; wherein the ratio

The invention provides a lithium-rich lithium supplement agent with high air stability and a preparation method thereof, and relates to the field of lithium ion battery lithium supplement agents. The preparation method of the lithium-rich lithium supplement agent with high air stability comprises the following steps: low-temperature carbonization coating and polymerization coating. According to the lithium-rich lithium supplement agent with high air stability and the preparation method, the air stability, the isolation performance and the water absorption of the lithium-rich lithium supplement agent are improved, the dynamic performance of the lithium-rich lithium supplement agent is improved, and the matching performance of the lithium-rich lithium supplement agent and a positive electrode material is improved; and the electrical performance is further improved.

The present application provides a cathode lithium supplement material, a cathode electrode sheet containing the material, and an electrochemical device. The cathode lithium supplement material includes: a matrix of xLi₂O·yM and carbon present on the matrix; wherein x > 0, 0.4x ≤ y ≤ 2x, and M includes at least one of Mn, Fe, Co, Ni, Cu, Cr, or V. The cathode lithium supplement material has strong chemical stability and can effectively improve the particle agglomeration phenomenon during the slurry mixing process. Applying the cathode lithium supplement material in the cathode electrode sheet can achieve the supplement of active lithium and effectively improve the energy density of the electrochemical device.

The present disclosure belongs to the technical field of lithium-supplementing agents, and disclosed are a positive electrode lithium-supplementing agent, and a precursor thereof, a preparation method therefor and the use thereof. The positive electrode lithium-supplementing agent precursor comprises a core material and a shell material, which coats the surface of the core material, wherein the core material is a porous spherical material composed of nanosheets, and the core material contains Ni(OH)2; and the shell material contains at least one of an oxide of an M element and a hydroxide of the M element, with the M comprising at least one of Mn, Co, Cu, Mg, Ca, Fe, Sr, Al and Ti. The shell material of the precursor is adsorbed on the core material and can react with a lithium source at low temperatures, so as to generate a lithium-containing metal oxide, which coats the surface of the core material and promotes a reaction between the lithium source and Ni(OH)2 to form a good solid solution, thereby realizing the effect of reducing the sintering temperature and facilitating obtaining a high-purity lithium-supplementing material. The positive electrode lithium-supplementing agent prepared from the precursor has low hygroscopicity and high stability.

The present disclosure relates to a cathode lithium supplement agent, its precursor, preparation method and application, belonging to the technical field of lithium supplement agents. The precursor of the cathode lithium supplement agent includes a core material and a shell material coated on the surface of the core material; the core material is a porous spherical material composed of nanosheets, and the core material contains Ni(OH)2; the shell material contains at least one of an oxide of element M and a hydroxide of element M, and M includes at least one of Mn, Co, Cu, Mg, Ca, Fe, Sr, Al and Ti. The shell material of the precursor adsorbs on the core material, can react with a lithium source at a low temperature to generate a lithium-containing metal oxide to wrap on the surface of the core material, and promotes the reaction of the lithium source with Ni(OH)2 to form a good solid solution, thereby playing a role in reducing the sintering temperature and being beneficial to obtaining a high-purity lithium supplement agent material. The cathode lithium supplement agent prepared from this precursor has low hygroscopicity and high stability.

The invention relates to a resource-saving method for producing alkali-metal-containing cathode active materials, which forgoes the use of additional, purified water through the use of condensate water from the precursors. The invention also relates to the purification of the alkali-metal-containing washing water that arises during the production of cathode active material. According to the invention, alkali-metal precursor recovered in the process is fed back to the production process.

A method for removing calcium in a lithium battery recycling process includes recovering acidic lithium liquid including calcium; adding an oxalate aqueous solution to the acidic lithium liquid as a first calcium removal process; raising the pH of the acidic lithium liquid to prepare an alkaline lithium liquid; and adding ammonium oxalate to the alkaline lithium liquid as a second calcium removal process.

Lithium oxide argyrodites having the formula Li(6−y)PS4O(1−y)X(1+y) where X is a halide anion and y is a number between 0 and 0.8, inclusive, are provided herein. Also provided are methods of synthesizing the lithium oxide argyrodites and composites including the lithium oxide argyrodites, as well as other alkali metal oxide argyrodites and related methods and composites.

The present invention relates to a process for preparing lithium sulfide (LiS) from lithium hydroxide (LiOH) and hydrogen sulfide (HS), characterized in that the lithium hydroxide is sulfided in a reaction zone (9) comprising at least one moving-bed tubular reactor (9a) with an ascending oscillating spiral configuration, in which the lithium hydroxide (4) circulates countercurrently to an anhydrous gas mixture (10) containing hydrogen sulfide and at least one inert gas.

The present invention relates to a method for recovering lithium from a stream containing lithium, the method comprising contacting the stream, or a pre-treated solution obtained from said stream, with sodium aluminate to form a slurry comprising a lithium aluminate precipitate, at an alkaline pH; and recovering the slurry containing said lithium aluminate, or a precipitate therefrom.

Embodiments relate to methods and processes for purification of lithium containing brines by selectively separating boron containing compounds. The method includes passing a feed brine including lithium and at least one boron compound through at least one semi-permeable membrane in which the boron compounds are separated from the lithium by preferentially passing the boron compounds through the membrane stage(s). At least one environmental condition of the feed brine and / or membrane stage(s) may be modified to allow boron compounds to be preferentially passed through the membrane stage(s). The lithium-rich concentrate stream may be further purified and / or converted into lithium products, while the resultant boron-rich permeate stream (including the separated boron containing compounds) may be further processed.

This invention belongs to the field of lithium-ion battery technology, specifically relating to a composite cathode material for lithium-ion batteries and its preparation method. The composite cathode material consists of three parts: a cathode matrix material, a lithium replenishment material, and a catalyst material. The preparation method is as follows: (1) preparing a composite material of the cathode matrix material and the lithium replenishment material in situ; (2) dispersing the catalyst material on the surface of the composite material and forming a stable interface layer between the catalyst material and the lithium replenishment material. Through the method of this invention: the lithium replenishment material has both surface modification of the cathode matrix material and lithium replenishment of the negative electrode, simultaneously improving the battery's initial efficiency and cycle stability; introducing the catalyst material onto the surface of the lithium replenishment material in situ fixes the free O generated by the Li release from the lithium replenishment material, alleviating the battery swelling phenomenon and further improving the battery's cycle stability and safety; moreover, the preparation process is simple, the raw materials are cheap and readily available, the production cost is low, and it is easy to promote industrial production.