14results about "Lithium nitrates" patented technology

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.

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.

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 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.

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.