120results about "Chloride preparation" patented technology

The invention provides a harmless and comprehensive utilization method of secondary aluminum dross and relates to a harmless and comprehensive utilization method of secondary aluminum dross produced in an aluminum dross treating process. The harmless and comprehensive utilization method is characterized in that slurry is prepared from the secondary aluminum dross produced in the aluminum dross treating process and water, a stirring deamination reaction is performed, and ammonia gas formed through the reaction is condensed or absorbed by water; slurry after the reaction is subjected to liquid-solid separation, separated liquid phase is subjected to evaporative crystallization, and a chlorate and fluoride salt mixture is obtained; separated solid phase is used for producing a calcium aluminate material. With adoption of the method, the aluminum dross can be treated harmlessly, useful components in the aluminum dross are recovered efficiently, the harmless secondary aluminum dross can replace high-alumina bauxite for preparing a calcium aluminate product, production cost is reduced greatly, zero-release utilization of the aluminum dross is realized, the process is simple, the operation is convenient, the cost is low, environmental protection is realized, and the method has wide applicability.

The invention discloses a preparation method of stable lead-free all-inorganic double perovskite A2BB'X6 nanocrystals. The method adopts a thermal injection technology to synthesize the nanocrystals,and concretely comprises the following steps: mixing a metal precursor salt, a reaction solvent oleic acid, oleylamine, octadecene and other raw materials, carrying out vacuum heating and stirring ata certain temperature for a certain period of time, rising the temperature to a suitable reaction temperature under the protection of N2, rapidly injecting the obtained hot oleate solution of A into areaction system, and then rapidly cooling the system to room temperature by using ice bath to finally obtain the A2BB'X6 perovskite nanocrystals having a uniform size. The method has the advantages of simplicity, convenient, good reappearance and environmental protection, and the obtained product has the advantages of uniform size, good dispersion, high stability and excellent photocatalytic performance, and can be applied to the fields of photocatalysis, photodetectors, laser, solar cells and the like.

Crystalline scintillator materials comprising nano-scale particles of metal halides are provided. The nano-scale particles are less than 100 nm in size. Methods are provided for preparing the particles. In these methods, ionic liquids are used in place of water to allow precipitation of the final product. In one method, the metal precursors and halide salts are dissolved in separate ionic liquids to form solutions, which are then combined to form the nano-crystalline end product. In the other methods, micro-emulsions are formed using ionic liquids to control particle size.

Optically transparent composite materials in which solid solution inorganic nanoparticles are dispersed in a host matrix inert thereto, wherein the nanoparticles are doped with one or more active ions at a level up to about 60 mole % and consist of particles having a dispersed particle size between about 1 and about 100 nm, and the composite material with the nanoparticles dispersed therein is optically transparent to wavelengths at which excitation, fluorescence or luminescence of the active ions occur. Luminescent devices incorporating the composite materials are also disclosed.

A method of producing metal chlorides is disclosed in which chlorine gas is introduced into liquid Cd. CdCl₂ salt is floating on the liquid Cd and as more liquid CdCl₂ is formed it separates from the liquid Cd metal and dissolves in the salt. The salt with the CdCl₂ dissolved therein contacts a metal which reacts with CdCl₂ to form a metal chloride, forming a mixture of metal chloride and CdCl₂. After separation of bulk Cd from the salt, by gravitational means, the metal chloride is obtained by distillation which removes CdCl₂ and any Cd dissolved in the metal chloride.

The invention discloses a high-purity polymetallic-element solid mixed salt. The solid mixed salt is prepared from raw materials of waste secondary lithium batteries, the content of impurities such as calcium, magnesium, copper, zinc, ferrum, aluminum, lead, cadmium and chromium in the solid mixed salt is lower than 10 ppm respectively. The invention also discloses a preparation method and application of the high-purity polymetallic-element solid mixed salt. The nickel, cobalt and manganese in waste batteries are treated and prepared into high-purity polymetallic solid mixed salt which is then used for preparing the anode material and the front-body material of batteries, thus the non-ferrous metal resources are recycled, and the high-purity polymetallic-element solid mixed salt has higher economic benefit and social benefit.

The disclosed processes can be effective for treating various materials comprising several different metals. These materials can be leached with HCl for obtaining a leachate and a solid. Then, they can be separated from one another and a first metal can be isolated from the leachate. Then, a second metal can further be isolated from the leachate. The first and second metals can each be substantially selectively isolated from the leachate. This can be done by controlling the temperature of the leachate, adjusting pH, further reacting the leachate with HCl, etc. The metals that can be recovered in the form of metal chlorides can eventually be converted into the corresponding metal oxides, thereby allowing for recovering HCl. The various metals can be chosen from aluminum, iron, zinc, copper, gold, silver, molybdenum, cobalt, magnesium, lithium, manganese, nickel, palladium, platinum, thorium, phosphorus, uranium, titanium, rare earth element and rare metals.

A method for efficiently extracting minerals of high purity from deep ocean water by using low temperature vacuum crystal is disclosed. The method comprises the steps of: obtaining concentrated liquid containing ion components and fresh water without the ion components by freshening the deep ocean water; separating crystals of a calcium salt, a sodium salt, and a sulfate from the concentrated liquid by heat-concentrating and filtering the concentrated liquid; obtaining a mixed salt slurry of a potassium salt and a magnesium salt by concentrating the concentrated liquid from which a calcium salt, a sodium salt, and a sulfate are removed; obtaining a solution in which a magnesium salt is dissolved and a crystal of a potassium salt by washing the mixed salt slurry with water; and obtaining a mixed crystal of a potassium salt and a magnesium salt by concentrating the solution in which a magnesium salt is dissolved, and then separating a magnesium salt solution with improved purity by filtering the concentrated solution in which a magnesium salt is dissolved.

The invention relates to a harmless treatment method for freon. The method comprises the steps of (1) dissolving an alkali in water to obtain an alkali aqueous solution, then conveying the alkali aqueous solution, the freon and an oxidizing agent into a hydrothermal reactor respectively; (2) preheating the mixed reactants, performing a hydrothermal oxidizing reaction, controlling a reaction temperature to be 200-300 DEG C and a reaction pressure to be 6-30 MPa, a harmless product is obtained after the hydrothermal reaction is carried out for 5-20 minutes; and (3) cooling a reaction product to obtain carbonate and inorganic salts of fluorine and chlorine. The hydrothermal condition is helpful for fully mixing of the reactants, and facilitates rapid reaction. Compared with a conventional method, the method provided by the invention has the advantages of high speed and high efficiency for the harmless treatment of the freon and has wide application prospects in the fields of waste treatment and waste recycle.

The invention discloses a deoxidation method for a molten salt and a deoxidated molten salt. The method comprises the following steps: introducing carbon into the molten salt, carrying out first-time heating under vacuum conditions until the molten salt is molten, carrying out first-time heat preservation, carrying out first-time cooling, then, carrying out second-time heating until the molten salt is molten, carrying out second-time heat preservation, and carrying out second-time cooling, thereby obtaining the deoxidated molten salt, wherein the molten salt is a fluoride molten salt and/or chloride molten salt. The deoxidation method disclosed by the invention is high in deoxidation efficiency and simple and easy in operation and is safe, reliable and controllable, the carbon-reduction product is removed in the form of gas and does not deposit, and nitrate radicals, sulfate radicals, free oxygen and oxygen-derived free radicals are removed from the molten salt, so that industrial production is facilitated; and in case of later-stage molten-salt treatment by HF-H2, phenomena that pipelines are blocked up by the molten salt and the molten salt is lost due to acute boiling of the molten salt caused by water vapor expansion are absent.

The invention relates generally to processes for the production of high-basicity and ultr-high basicity polyaluminum chlorides including aluminum chlorohydrate. The processes can produce products of a wide range of basicities and are particularly useful in producing high basicity products. The process can produce a wide range of solution concentrations and are particularly useful in producing high solution concentrations. The processes described generate high purity products, which are free of by-product salt(s). The processes described herein can also be utilized to produce enhanced efficacy polyaluminum chlorides including aluminum chlorohydrate. When compared to conventional processes for manufacturing these compounds the processes disclosed herein are unique in so far as the disclosed processes do not require aluminum metal as a starting material. The products of the processes are suitable in applications including water purification, catalysts, and antiperspirants. In addition, the invention is directed to the products prepared by the processes described herein.

The invention discloses a method for producing electrolytic zinc through a high-chloride zinc ash material ammonia leaching ion exchange combined process. The method comprises the steps that (1) high-chloride zinc ash is made into slurry, ammonia is added to conduct ammonia leaching; ammonia leaching filter residues and ammonia leaching filtrate are obtained after filtration; if the concentration of chloride ions in the filtrate is less than 80 g/L, slurrying and ammonia leaching are conducted again; and if the concentration of chloride ions in the filtrate is greater than 80 g/L, a way is opened, and chlorine salt I is recovered; the ammonia leaching filter residues are rinsed to obtain rinsing water and after-rinsed zinc ash, the after-rinsed zinc ash is subjected to sulfuric acid leaching to obtain a zinc sulfate solution and leaching residues, and the leaching residues are used for recovery of zinc and lead; chloride ions are removed from the zinc sulfate solution by using ion exchange resin, the zinc sulfate solution is subjected to electrodeposition sending and zinc is recovered after dechlorination, and an ion exchange desorption after-solution is subjected to dechlorination to generate chlorine salt II and returns to the ion exchange resin as a desorption reagent. Through the method, high-efficiency and low-cost impurity removal and harm removal of high-chloride zinc ash with the treatment effect which is several times higher than the treatment limit effect obtained through an existing dechlorination process is realized; a new acceptable raw material source is provided for production of electrolytic zinc; emissions of waste liquor and waste residues are avoided, and the environmental protection effect and economic and social benefits are remarkable.

The invention relates to a refractory compound powder material preparation device which comprises a source metal melting unit, an atomization-reaction furnace, a cooling unit and a refractory compound powder collection and classification unit. A source metal passes through the melting unit to form a liquid stream, the liquid flow enters the atomization unit, and the molten metal is atomized to form tiny liquid drops to react with reactant gas, so that the metal liquid drops are converted into refractory compound powder; and meanwhile, the metal liquid drops continuously react under the action of a grain homogenizer to form multielement refractory compound crystal grains. The crystal grains are cooled and subjected to grain collection and classification to obtain the refractory compound powder material. The device integrates the functions of melting, atomization, reaction, synthesis, cooling, collection and classification, and can be used for preparing the refractory compound powder material with high purity and uniform grains. The device has the advantages of high efficiency and small influence on the environment, and is suitable for popularization and application in the field of powder metallurgy.

The invention discloses a method of preparing the nano particles of alkali earth fluoride. The method is to dissolve alkaline earth salt and fluoride respectively into reaction medium, then, the alkaline earth salt solution reacts with the fluoride solution for 1-5 hours under room temperature through precipitation method, then the nano-particles can be gotten after filtration, washing and vacuum drying. The invention is simple in operation, low in cost and easy to be popularized in industry; no special process equipment is needed. The nano particles of alkali-earth-fluoride can be taken as grease additives and have good performances of wear resistance, antifriction and extreme pressure resistance.