6results about "Aluminium nitrates" patented technology

To provide a coating liquid for film formation that can form a metal oxide film with excellent flatness even on uneven surfaces and reliable heat resistance by chemical vapor deposition. [Solution] A coating solution for forming metal oxide films by chemical vapor deposition, wherein the coating solution is a one-component coating solution containing a β-diketone complex, an inorganic metal salt, and a solvent, or a multi-component coating solution comprising coating solution A containing a β-diketone complex and a solvent, and coating solution B containing an inorganic metal salt and a solvent, wherein the β-diketone complex and the inorganic metal salt are composed of metal atoms of period 3 to 6 and group 2 to 14.

The present application belongs to the technical field of lithium nitrate solution aluminum-lithium separation, and specifically relates to a method for self-adsorption separation and recycling of aluminum nitrate solution containing trace lithium, which comprises the following steps: S1: treating lithium ore or nitric acid leaching solution containing lithium waste by using a nanofiltration membrane to obtain monovalent ion solution mainly containing lithium nitrate and non-mono-valent ion solution mainly containing aluminum nitrate; S2: using the monovalent ion solution obtained in S1 to prepare battery-grade lithium carbonate after purification and impurity removal; S3: adding magnesium oxide or magnesium carbonate to the non-mono-valent ion solution obtained in S1 to adjust the pH to 2-3.4, and the reaction temperature is 40-100 DEG C; S4: washing the Al(OH)3 precipitate obtained in S3 with water to obtain a mixture containing Li + solution and crude Al(OH)3; and subsequent treatment. The present application has the advantages of simple process, low processing cost, high lithium metal recovery rate, green and environmentally-friendly process, good economic benefits, and easy industrialization application.

The present application belongs to the technical field of waste liquid treatment, and particularly relates to a graphite purification waste liquid treatment method and a treatment system. The present application introduces a pre-acid pickling system to utilize waste acid twice, reduces the amount of acid used in the acid pickling process of graphite purification, improves the use efficiency of acid liquid, thereby reducing the cost of the graphite purification process and significantly enhancing the overall economy. The present application also introduces a sodium fluorosilicate production line, effectively realizing the resource utilization of residual fluorosilicic acid and fluorosilicate in waste water. Not only can the operation cost of reagents in the subsequent water treatment process be effectively reduced, but also the produced sodium fluorosilicate can be sold to improve economic benefits. An evaporation crystallization system is used to crystallize and recover valuable salts in waste water. The obtained crystalline salt can be further used as a raw material for other products. The treatment system provided by the present application can realize the resource utilization and recycling of waste acid and waste water, and achieve zero emission.

A method for the preparation of alumina from alunite, the method comprising the steps of: (i) attrition of an alunite material; (ii) washing and settling the alunite material to reduce sodium content; (iii) acid leaching and roasting the Na-reduced alunite material; (iv) passing the product of the acid leach and roast step (iii) to a water leaching step to produce a liquid product comprising aluminium and potassium; (v) subjecting the liquid product of step (iv) to a precipitation step to precipitate an aluminium salt; (vi) purifying the aluminium salt; and (vii) subjecting the purified aluminium salt to a calcination step to produce alumina.

A process for producing high purity alumina (HPA) or high purity aluminium salts from an aluminium-bearing material, such as is disclosed. An aluminium-bearing solution is first obtained by either dissolving or leaching the aluminium-bearing material. Aluminium is then selectively extracted by liquid-liquid or liquid-solid extraction to obtain an aluminium-enriched liquid or aluminium-enriched solid phase. Minor metal impurities still remaining in the aluminium-enriched liquid or solid phase are removed by scrubbing the aluminium-enriched liquid or aluminium-loaded ion exchange resin with an aqueous solution thereby producing a metal impurity-depleted aluminium-enriched liquid or metal impurity-depleted aluminium enriched solid phase. Aluminium is then stripped from the scrubbed liquid or solid phases with an acidic aqueous solution to produce an aluminium-enriched aqueous solution. High purity aluminium salts may be crystallised from said solution. Alternatively, the pH of said solution may be raised to precipitate an aluminium precipitate, such as Al(OH)3, which is then calcined to produce HPA.

A process for preparing alumina from alunite, the process comprising the steps of: (i) grinding alunite material; (ii) washing and settling the alunite material to reduce sodium content; (iii) acid leaching and roasting the Na reduced alunite material; (iv) subjecting the product of the acid leaching and roasting step (iii) to a water leaching step to produce a liquid product comprising aluminum and potassium; (v) subjecting the liquid product of step (iv) to a precipitation step to precipitate an aluminum salt; (vi) purifying the aluminum salt; and (vii) subjecting the purified aluminum salt to a calcination step to produce alumina.