13results 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 invention provides high-purity nanometer aluminum oxide and a preparation method thereof, and belongs to the technical field of aluminum oxide preparation. The method comprises the following steps: reacting aluminum hydroxide with nitric acid to obtain an aluminum nitrate solution, and sequentially carrying out spray drying, nitric acid removal, acidification replacement, flash evaporation and roasting to obtain the high-purity nano aluminum oxide with low impurity content and uniform particle size distribution. The preparation process is simple, the safety coefficient is high, and the quality control of the nano aluminum oxide is well realized.

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.

The invention relates to the synthesis of ternary MgCaA1 layered double hydroxides (LDH) from eggshells, functionalization of the synthesized LDHs with different polymers, and the use of these obtained new composites in CO2 capture applications.

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.

Oxygen generators and methods related to the generation of oxygen using activated aluminum alloys and inorganic acids such as nitric acid are generally described. In some embodiments, aluminum nitrate is thermally decomposed to produce oxygen and nitrogen dioxide. The nitrogen dioxide may also optionally be used to produce oxygen gas. In some embodiments, a reaction between nitric acid and an activated aluminum alloy may be used to produce the aluminum nitrate. In other embodiments, a reaction between nitric acid and aluminum hydroxide may be used to produce the aluminum nitrate.

The invention provides a method for preparing aluminum hydroxide from an aluminum-containing salpeter solution and denitration, and belongs to the field of metallurgical solid waste treatment.The method comprises the following steps that S1, aluminum-containing tailings are subjected to nitric acid leaching and then subjected to solid-liquid separation, and aluminum-containing leaching liquid and silicon-containing leaching residues are obtained; s2, carrying out homogeneous precipitation on the aluminum-containing immersion liquid and lime milk, and then carrying out solid-liquid separation to obtain basic aluminum nitrate and calcium-containing mother liquor; and S3, carrying out denitration reaction on the basic aluminum nitrate and the aluminum hydroxide hydroxide, carrying out solid-liquid separation to obtain aluminum hydroxide and an aluminum nitrate solution, and freezing and crystallizing the calcium-containing mother solution to obtain a calcium nitrate product. The solid waste aluminum-containing tailings are recycled, the technological process is short, the aluminum recovery rate is high, and the byproduct utilization rate is high.

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.

The invention relates to the synthesis of ternary MgCaA1 layered double hydroxides (LDH) from eggshells, functionalization of the synthesized LDHs with different polymers, and the use of these obtained new composites in CO2 capture applications.

The invention provides a method for extracting aluminum oxide by treating fly ash through a nitric acid method, and belongs to the technical field of non-ferrous metallurgy. According to the method for extracting the aluminum oxide by treating the fly ash through the nitric acid method, external voltage is applied during acid leaching, ions in nitric acid are promoted to migrate, the electron obtaining capacity of hydrogen ions is improved, the reaction with the aluminum oxide can be accelerated, the dissolution process is promoted, and therefore leaching of the aluminum oxide at the temperature of 60-100 DEG C under the normal pressure is achieved; the production safety is improved; by adopting fluidized roasting, the mineral activity is improved, the roasting time is shortened to the second level, the energy consumption is reduced, and the production efficiency is improved.

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.

A comprehensive recycling and utilization process for pollutants in high-aluminum coal flue gas purification, which adopts physical adsorption and chemical adsorption methods to remove SO2 from the flue gas; adopts oxidation + adsorption method to remove NOx from the flue gas; adopts water-soluble impregnation method to desorb two adsorbents; absorbs AL2O3\Fe2O3 in the smoke dust by mixing the desorption liquid with the flue gas and converts it into AL2(SO4)2\AL(NO3)3\Fe(NO3)3\AL(NO3)3; adopts step-by-step crystallization method to separate aluminum sulfate and ferric sulfate according to the difference in solubility of each component; decomposes aluminum sulfate and aluminum nitrate into aluminum hydroxide, ammonium sulfate and ammonium nitrate by ammonia double decomposition method; and re-absorbs and converts impurities discharged after extracting aluminum and iron in a high-speed stirring reactor by sodium hydroxide liquid phase fusion method, so that the silicon dioxide in the impurities is fused with the impurities and converted into sodium metasilicate, thereby completing the maximum recycling and utilization of fly ash.