26results about "Lithium nitrates" patented technology

The invention provides a lithium source eutectic mixture, a positive electrode material, preparation methods of the lithium source eutectic mixture and the positive electrode material, a positive electrode plate and a lithium ion battery. The lithium source eutectic mixture comprises a first lithium compound and a second lithium compound, wherein the melting point of the first lithium compound is smaller than that of the second lithium compound; according to the embodiment of the invention, the second lithium compound with a lower melting point is added into the first lithium compound, and compared with a single lithium compound, the lithium source eutectic mixture reduces the melting point of the lithium source phase, so that a liquid phase is rapidly generated during sintering, and rapid diffusion of lithium ions is accelerated; moreover, the liquid phase is beneficial to wrapping other components, promoting the uniformity of the reaction and improving the compactness of the lithium source eutectic mixture, so that the sintering temperature is reduced, and the influence on the electrical property of the positive electrode material is reduced.

A process and system are disclosed for producing lithium oxide from lithium nitrate. In the process and system, the lithium nitrate is thermally decomposed in a manner such that a fraction of the lithium nitrate forms lithium oxide, and such that a remaining fraction of the lithium nitrate does not decompose to lithium oxide. The thermal decomposition may be terminated after a determined time period to ensure that there is a remaining fraction of lithium nitrate and to thereby produce a lithium oxide in lithium nitrate product. The lithium oxide in lithium nitrate product may have one or more transition-metal oxides, hydroxides, carbonates or nitrates added thereto to form a battery electrode. The lithium oxide in lithium nitrate product may alternatively be subjected to carbothermal reduction to produce lithium metal.

The present disclosure provides for methods and systems for processing brine to obtain lithium. The present disclosure provides for methods that leverages intercalation materials and drives lithium capture using a chemical approach to treating brine as opposed an electrochemical approach, which can be complicated and expensive. The present disclosure provides for a chemical redox-driven approach to selectively extract Li+ from brine.

A process and system are disclosed for producing lithium oxide from lithium nitrate. In the process and system, the lithium nitrate is thermally decomposed in a manner such that a fraction of the lithium nitrate forms lithium oxide, and such that a remaining fraction of the lithium nitrate does not decompose to lithium oxide. The thermal decomposition may be terminated after a determined time period to ensure that there is a remaining fraction of lithium nitrate and to thereby produce a lithium oxide in lithium nitrate product. The lithium oxide in lithium nitrate product may have one or more transition-metal oxides, hydroxides, carbonates or nitrates added thereto to form a battery electrode. The lithium oxide in lithium nitrate product may alternatively be subjected to carbothennal reduction to produce lithium metal.

The present invention relates generally to a process for co-producing lithium, aluminum, and silicon-oxygen (Si-O) materials, and more particularly, to a process for co-producing lithium, aluminum, and Si-O materials from a hard rock source in the form of a granular concentrate of one or more lithium-containing silicate minerals including spodumene. In particular, there is provided a process for co-producing Li, Al, and Si-O materials from the beta (β) crystallographic form of the Li-containing silicate mineral spodumene, which in its purest state has the composition LiAlSi2O6.

The invention provides a method for preparing high-purity lithium nitrate by pyrolyzing and separating aluminum and lithium in a lepidolite leaching solution, and relates to the technical field of lithium nitrate preparation, which comprises the following steps: ball-milling lepidolite; adding water into the ball-milled lepidolite, pulping, adding nitric acid, carrying out nitric acid pressure leaching reaction, and filtering a solid-liquid mixture obtained by the reaction to obtain leachate and leaching residues; carrying out negative pressure evaporation concentration on the leachate to obtain a mixed solid of lithium nitrate and aluminum nitrate, and calcining and pyrolyzing to obtain a solid mixture of aluminum oxide and lithium nitrate and nitric oxide gas; dissolving the solid mixture in water, and separating to obtain crude aluminum oxide and a lithium nitrate solution; and sequentially carrying out negative pressure evaporation concentration, resin impurity removal and evaporation crystallization on the obtained lithium nitrate solution to obtain high-purity lithium nitrate and crystallization mother liquor. The materials used in the invention are common industrial products, are easy to purchase and are low in price; the whole technological process is simple, easy to operate, environment-friendly and easy to implement on a production line.

A process and system are disclosed for producing lithium oxide from lithium nitrate. In the process and system, the lithium nitrate is thermally decomposed in a manner such that a fraction of the lithium nitrate forms lithium oxide, and such that a remaining fraction of the lithium nitrate does not decompose to lithium oxide. The thermal decomposition may be terminated after a determined time period to ensure that there is a remaining fraction of lithium nitrate and to thereby produce a lithium oxide in lithium nitrate product. The lithium oxide in lithium nitrate product may have one or more transition-metal oxides, hydroxides, carbonates or nitrates added thereto to form a battery electrode. The lithium oxide in lithium nitrate product may alternatively be subjected to carbothennal reduction to produce lithium metal.

The present invention provides a synthesis method of an aluminum-based lithium ion sieve and its application in the field of lithium extraction from salt lakes, belonging to the technical field of selectively extracting and recovering lithium from lithium-containing solutions, and comprising the following steps: obtaining a clear and transparent lithium salt solution; impregnating activated alumina in the lithium salt solution; adding an alkaline solution to adjust the pH value; and obtaining the adsorbent through drying, high-temperature steam heat treatment, and drying. The prepared aluminum-based adsorbent can be used for extracting and recovering lithium ions in lithium-containing solutions such as slightly acidic or neutral salt lake brines and oilfield produced waters. The adsorbent can be eluted without damage with pure water, and the adsorption and desorption processes are reversible. It has the advantages of mild use conditions, large adsorption capacity, good stability, and less component loss.

A process and system are disclosed for producing a lithium product from a solution comprising lithium nitrate. The solution comprising lithium nitrate can be obtained by reacting a lithium-containing metal silicate with nitric acid. The process and system comprise subjecting the solution comprising lithium nitrate to a first thermal treatment procedure (in one or more heated vessels) in which water and nitric acid (when present) are removed, and whereby a resultant lithium nitrate-rich crystal slurry is heated to produce a molten liquid. The process and system also comprise passing the molten liquid to a second thermal treatment procedure (in a further-heated vessel) in which the molten liquid is heated to substantially decompose lithium nitrate to lithium oxide.

A process and system are disclosed for producing a lithium product from a solution comprising lithium nitrate. The solution comprising lithium nitrate can be obtained by reacting a lithium-containing metal silicate with nitric acid. The process and system comprise subjecting the solution comprising lithium nitrate to a first thermal treatment procedure (in one or more heated vessels) in which water and nitric acid (when present) are removed, and whereby a resultant lithium nitrate-rich crystal slurry is heated to produce a molten liquid. The process and system also comprise passing the molten liquid to a second thermal treatment procedure (in a further-heated vessel) in which the molten liquid is heated to substantially decompose lithium nitrate to lithium oxide.

The invention provides a method for preparing lithium nitrate based on a strong-acid-free cyclic metathesis reaction, which is characterized by comprising the following steps: mixing lithium carbonate and water, introducing carbon dioxide for carbonization, slowly adding a calcium nitrate solution for cyclic metathesis reaction, and sequentially heating, filtering, adsorbing to remove impurities and crystallizing after the reaction is finished, thereby obtaining the lithium nitrate. According to the method, a high-purity and high-yield lithium nitrate product can be obtained only by adopting lithium carbonate, calcium nitrate and carbon dioxide through a cyclic double decomposition reaction, strong acid and other chemical reagents do not need to be added in the whole reaction process, on the premise that no waste water or waste gas is generated, introduction of new impurities is effectively avoided, the impurity removal process is greatly simplified, and the production cost is reduced. The technical problems of high production cost, complicated impurity removal process and low yield in the prior art are fundamentally solved.

A process and system are disclosed for producing a lithium product from a solution comprising lithium nitrate. The solution comprising lithium nitrate can be obtained by reacting a lithium-containing metal silicate with nitric acid. The process and system comprise subjecting the solution comprising lithium nitrate to a first thermal treatment procedure (in one or more heated vessels) in which water and nitric acid (when present) are removed, and whereby a resultant lithium nitrate-rich crystal slurry is heated to produce a molten liquid. The process and system also comprise passing the molten liquid to a second thermal treatment procedure (in a further-heated vessel) in which the molten liquid is heated to substantially decompose lithium nitrate to lithium oxide.

A process and system are disclosed for producing a lithium product from a solution comprising lithium nitrate. The solution comprising lithium nitrate can be obtained by reacting a lithium-containing metal silicate with nitric acid. The process and system comprise subjecting the solution comprising lithium nitrate to a first thermal treatment procedure (in one or more heated vessels) in which water and nitric acid (when present) are removed, and whereby a resultant lithium nitrate-rich crystal slurry is heated to produce a molten liquid. The process and system also comprise passing the molten liquid to a second thermal treatment procedure (in a further-heated vessel) in which the molten liquid is heated to substantially decompose lithium nitrate to lithium oxide.

A process and system are disclosed for producing a lithium product from a solution comprising lithium nitrate. The solution comprising lithium nitrate can be obtained by reacting a lithium-containing metal silicate with nitric acid. The process and system comprise subjecting the solution comprising lithium nitrate to a first thermal treatment procedure (in one or more heated vessels) in which water and nitric acid (when present) are removed, and whereby a resultant lithium nitrate-rich crystal slurry is heated to produce a molten liquid. The process and system also comprise passing the molten liquid to a second thermal treatment procedure (in a further-heated vessel) in which the molten liquid is heated to substantially decompose lithium nitrate to lithium oxide.

The application provides a method for preparing high-purity lithium nitrate from lithium ore after aluminum removal, and relates to the technical field of high-purity lithium nitrate preparation, and comprises the following steps: ball milling lithium ore; adding water to the ball-milled lithium ore to make pulp, then adding nitric acid and Al2O3 into the slurry to perform pressure leaching reaction, filtering the obtained solid-liquid mixture to obtain leaching solution and leaching residue; adjusting the pH value of the leaching solution to remove trace impurities in the solution, and obtaining lithium nitrate solution through extraction and back extraction of the obtained impurity-removed solution; evaporating and concentrating the lithium nitrate solution to crystallize, and obtaining high-purity lithium nitrate product. Since Al2O3 is added in the nitric acid leaching stage, the aluminum in the leaching solution can be induced to hydrolyze under high temperature and high pressure in the nitric acid system and remain in the leaching residue, the acid consumption is reduced, and the cost of traditional leaching solution impurity removal is reduced. The method changes the traditional large lithium loss in leaching solution impurity removal, simultaneously simplifies the steps of converting traditional lithium carbonate or lithium hydroxide into lithium nitrate, the process route is shorter, and the process cost is lower.

The invention relates to the technical field of waste lithium iron phosphate electrode material recovery, and particularly discloses a method for selectively extracting lithium and removing aluminum from waste lithium iron phosphate positive electrode powder. The method comprises the following steps: S1, adding pure water into waste lithium iron phosphate positive electrode powder for size mixing, and carrying out ball milling on the size; s2, heating the ball-milled slurry, and then adding nitric acid for acid leaching for 1-1.5 h; s3, an oxidizing agent is added into the acid leaching slurry to react for 2-3 h; s4, adding pure water into the slurry, and continuously reacting for 1-2 hours; s5, slurry obtained after the reaction is completed is filtered, obtained filter residues are filtered after being washed with water, washing filtrate is returned to the front end for acid leaching use, and the filter residues are low-aluminum lithium extraction residues; according to the method, the lithium iron phosphate positive electrode powder is mechanically activated, the nitric acid and the oxidizing agent are accurately proportioned according to the content of the impurity lithium and the impurity aluminum in the raw materials, and the high-efficiency selective lithium extraction and aluminum removal effects are realized by adding water in batches for reaction.

A process and system are disclosed for producing lithium oxide from lithium nitrate. In the process and system, the lithium nitrate is thermally decomposed in a manner such that a fraction of the lithium nitrate forms lithium oxide, and such that a remaining fraction of the lithium nitrate does not decompose to lithium oxide. The thermal decomposition may be terminated after a determined time period to ensure that there is a remaining fraction of lithium nitrate and to thereby produce a lithium oxide in lithium nitrate product. The lithium oxide in lithium nitrate product may have one or more transition-metal oxides, hydroxides, carbonates or nitrates added thereto to form a battery electrode. The lithium oxide in lithium nitrate product may alternatively be subjected to carbothennal reduction to produce lithium metal.

A process and system are disclosed for producing lithium oxide from lithium nitrate. In the process and system, the lithium nitrate is thermally decomposed in a manner such that a fraction of the lithium nitrate forms lithium oxide, and such that a remaining fraction of the lithium nitrate does not decompose to lithium oxide. The thermal decomposition may be terminated after a determined time period to ensure that there is a remaining fraction of lithium nitrate and to thereby produce a lithium oxide in lithium nitrate product. The lithium oxide in lithium nitrate product may have one or more transition-metal oxides, hydroxides, carbonates or nitrates added thereto to form a battery electrode. The lithium oxide in lithium nitrate product may alternatively be subjected to carbothennal reduction to produce lithium metal.

The embodiment of the present specification provides a lithium carbonate production process adjustment method and adjustment system, electronic equipment and product, wherein the production process adjustment method comprises: obtaining component information of waste gas, and determining a production process corresponding to the component information of the waste gas; determining an optimization target and a constraint condition corresponding to the production process of the lithium carbonate; establishing a target function according to the component information of the waste gas, the production process corresponding to the component information of the waste gas, and the optimization target of the production process of the lithium carbonate; when the constraint condition is satisfied, obtaining a plurality of optimization target values corresponding to the target function; and adjusting the production process parameters of the lithium carbonate according to the plurality of optimization target values. By using the above technical solution, the production process of the lithium carbonate can be flexibly adjusted, and the production efficiency of the lithium carbonate is improved.

The present disclosure relates generally to methods for the integration of electrochromic films onto a substrate, such as a glass window, and the systems / structures formed via such methods.

An improved beta(β)-spodumene (~LiAlSi2O6) nitric acid conversion process produces discrete lithium (Li), aluminum (Al) and silica (SiO2) materials by: (i) converting lithium nitrate, LiNO3, to lithium carbonate, Li2CO3; (ii) creating a Al-rich precipitate either by thermally decomposing aluminum nitrate, Al(NO3)3, or by reacting AI(NO3)3 with aqueous and / or solid ammonium carbonate, (NH4)2CO3; and (iii) forming a solid SiO2-rich aluminosilicate residue by selectively leaching Li and Al from β-spodumene. Three key reactants consumed during processing nitric acid (HNO3), ammonia (NH3). and magnesium oxide (MgO) -may be regenerated internally by closed-loop chemical cycles, this feature of the process greatly improving its economics in commercial applications.

A process and system are disclosed for producing lithium oxide from lithium nitrate. In the process and system, the lithium nitrate is thermally decomposed in a manner such that a fraction of the lithium nitrate forms lithium oxide, and such that a remaining fraction of the lithium nitrate does not decompose to lithium oxide. The thermal decomposition may be terminated after a determined time period to ensure that there is a remaining fraction of lithium nitrate and to thereby produce a lithium oxide in lithium nitrate product. The lithium oxide in lithium nitrate product may have one or more transition-metal oxides, hydroxides, carbonates or nitrates added thereto to form a battery electrode. The lithium oxide in lithium nitrate product may alternatively be subjected to carbothennal reduction to produce lithium metal.

The present application belongs to the technical field of lithium battery recycling, and provides a mixed recycling process for waste lithium iron phosphate battery powder and ternary lithium battery powder. The present application uses waste lithium iron phosphate battery powder and waste ternary lithium battery powder as raw materials, and realizes efficient separation and recovery of valuable metal ions and graphite through processes of roasting and water leaching, one-stage organic acid leaching, two-stage organic acid leaching, acid dissolution, resin copper removal and the like, which is simple and environmentally friendly. The roasting process removes fluorine in the two kinds of waste battery powder, avoids corrosion and damage of fluorine to the autoclave in the subsequent high-pressure impurity removal process, improves the safety factor of the equipment, and increases the safety of the process. In addition, no other impurity removal auxiliary materials need to be added in the process, which greatly reduces the cost investment and increases the economic benefit.

An improved beta (beta)-spodumene (-LiAlSi2O6) nitric acid conversion process produces discrete lithium (Li), aluminum (Al) and silicon dioxide (SiO2) materials by (i) converting lithium nitrate LiNO3 to lithium carbonate Li2CO3; (ii) producing an Al-rich precipitate by thermal decomposition of aluminum nitrate Al (NO3) 3 or by reaction of Al (NO3) 3 with aqueous and / or solid ammonium carbonate (NH4) 2CO3; and (iii) forming a solid SiO2-rich aluminum silicate residue by selectively leaching Li and Al from the beta-spodumene. Three key reactants such as nitric acid (HNO3), ammonia (NH3) and magnesium oxide (MgO) consumed in the processing process can be regenerated internally through closed-loop chemical circulation, and the economical efficiency of the method in commercial application is greatly improved due to the characteristic of the method.

The present invention relates generally to a process for co-producing lithium, aluminum and silicon-oxygen (Si-O) materials, and more particularly, to a process for co-producing lithium, aluminum and Si-O materials from a hard rock source in the form of a particulate concentrate of one or more lithium-containing silicate minerals comprising spodumene. Specifically, a process is provided for co-production of Li, Al and Si-O materials from the beta-form of lithium-containing silicate mineral spodumene having the composition LiAlSi2O6 in its purely state.