35results about "Chromium halides" patented technology

The present invention concerns specific new compounds of formula Li(2−x)Na(x)MO(2−y / 2)F(1+y) (where 0≤x≤0.2 and −0.6≤y≤0,8 and M is a transition metal), cathode material comprising the new compounds, batteries and lithium-cells comprising said new compound or cathode material, a process for the production of the new compound and their use.

A method for synthesis of lactic acid and its derivatives is provided. First, a mixture is prepared, which includes: at least one carbohydrate-containing raw material, at least one alcohol, at least one composite catalyst containing metal chloride(s) (MCln) and tin-containing compound(s), and at least one solvent, wherein M is selected from a group consisting of Li+, Na+ K+, Mg2+, Ca2+, Sr2+, Ga3+, In3+, Sb3+, Bi3+, Cr3+, Mn2+, Fe2+, Co2+, Ni2+, Zn2+, and n represents 1, 2 or 3. Then, the mixture is heated to obtain lactic acid and its derivatives. By using the above catalyst and method, it is capable of converting carbohydrate-containing raw material to lactic acid and its derivatives directly in a more efficient and economical way.

A process for chlorinating ore, slag, mill scale, scrap, dust and other resources containing recoverable metals from the groups 4-6, 8-12, and 14 in the periodic table. The process comprises: a) forming a liquid fused salt melt consisting essentially of aluminum chloride and at least one other metal chloride selected from the group consisting of alkali metal chlorides and alkaline earth metal chlorides, wherein the aluminum chloride content in the liquid salt melt exceeds 10% by weight; b) introducing the recoverable metal resources into said liquid salt melt: c) reacting the aluminum chloride as chlorine donor with said recoverable metal resource to form metal chlorides, which are dissolved in the salt melt; and d) recovering the formed metal chlorides from the salt melt.

Disclosed is an aqueous solution of a chromium salt, in which the oxalic acid content is 8% by weight or less relative to chromium. In the aqueous solution of the chromium salt, the total organic carbon content is 4% by weight or less relative to chromium. The chromium salt is preferably a chromium chloride, a chromium phosphate, or a chromium nitrate. The chromium chloride preferably contains a basic chromium chloride represented by the composition formula Cr(OH)xCly (wherein 0<x≦2, 1≦y<3, and x+y=3). The chromium phosphate is preferably one represented by the composition formula Cr(H3-3 / nPO4)n (wherein n is a number satisfying 2≦n≦3). The chromium nitrate is preferably a basic chromium nitrate represented by the composition formula Cr(OH)x(NO3)y (wherein 0<x≦2, 1≦y<3, and x+y=3).

A material composition is disclosed which is preferably used for synthesizing a porous metal fluoride which has a large surface area and is stable in a corrosive environment. A porous metal fluoride obtained by subjecting such a material composition to hydrogen fluoride treatment has a larger surface area and is stable in a corrosive environment, and thus can be used as a fluorination catalyst.

The invention discloses a production method for the coproduction of chromium chloride and chromic carbonate, and the production method is used for solving the problems that the chromic carbonate produced through the existing method is easy to age, and the solubility of the chromic carbonate in acidic aqueous solutions is greatly reduced after the chromic carbonate is subjected to long-term storage. According to the production method, an alkaline solution of sodium chromate is taken as a raw material, sulfur and alkali sulfide are taken as reducing agents to be subjected to redox reaction in a reaction tank so as to obtain chromic hydroxide, the obtained chromic hydroxide is filtered and washed and then reacts with hydrochloric acid to produce the chromium chloride, and the chromic carbonate is produced in a manner that the chromium chloride is subjected to the precipitation of a soda solution. The production method has the advantages that the process flow is short, the operation is simple, the redox reaction is complete, the chromium yield is high, and hexavalent chromium is not detected in the filtrate, so that the pollution to the environment cannot be caused.

The invention discloses a purification process of mineral slag by a chlorination process. The process comprises the following steps: carrying out low-temperature chlorination and recovering a solid product after reaction through a cyclone separation device; recovering a gaseous product through a first dust collector; carrying out high-temperature chlorination and recovering the gaseous product after reaction through a condenser; and settling the solid product after reaction through a second dust collector to form dust collecting slag. According to the process disclosed by the invention, elements in associated lean ores can be effectively separated to obtain a required corresponding product, so that the utilization mode of lean ore resources is enriched. According to the process disclosed by the invention, a chromium trichloride product of an industrial grade can be obtained, so that a problem of treating chromium slag after extraction of resources is avoided.

The present disclosure provides a catalyst for preparing lactic acid and derivatives thereof, comprising at least one of metallic compounds MXn, wherein M is selected from Na, K, Mg, Ca, Sr, Ba, Al, Ga, In, Sn, Sb, Bi, Cr, Mn, Fe, Co, Ni and Zn, and n is an integer of 1 to 6. The present disclosure further provides a method for synthesis of lactic acid and derivatives thereof, wherein at least one raw material including carbohydrates, at least one alcohol, at least one of the aforesaid catalysts and at least one solvent are heated to react to prepare lactic acid and derivatives thereof.

The invention relates to a carbon ferrochrome liquid phase method for manufacturing new energy battery materials and new energy hydrogen technology. The invention has advanced technology, energy saving and environmental protection, and does not require coal burning and high temperature and pressure. New energy, a variety of new energy battery materials, pigments and chemical chromium salts and other products have formed a series of new high-end industrial chains, which have changed the original situation of single-purpose products and simple production, greatly enhanced the international competitiveness of enterprises, and promoted The optimization, upgrading and development of the national industry is of great significance.

The invention relates to a method for improving the quality of industrial chromic chloride. The method comprises the following steps: adding industrial chromic chloride as a raw material into high purity water for dissolving; carrying out membrane filtration on a dissolving solution by a modified kynoar polyvinylidene fluoride membrane to obtain a filtrate in which metal ion impurities are removed; removing water and cooling under normal pressure; drying a separated crystal to obtain chromic chloride with improved quality. Through detection, the purity of chromic chloride reaches 99.5% or more and meets the quality standard of HG3-935-81. The method is good in effect of removing the metal ion impurities, and an obtained chromic chloride product has stable quality and is suitable for industrial production.

The invention discloses a system and a method for producing a high-purity energy storage material for liquid flow batteries by using high chromium type vanadium residue. According to the present invention, through selective chlorination in a circulating fluidized bed, vanadium, chromium and iron in high chromium vanadium residue are converted into corresponding gaseous chlorides, and most of impurities such as manganese, titanium, silicon and the like in the vanadium residue are remained in the chlorinated residue so as to separate the valuable elements from other impurities; the gaseous chloride is subjected to high temperature dust collection to separate crude chromium trichloride, is subjected to medium temperature dust collection to separate crude ferric chloride, and is subjected to low temperature leaching to separate crude vanadium oxytrichloride; the crude chromium trichloride is subjected to volatilization purification to obtain high-purity chromium trichloride; the crude ferric chloride is subjected to volatilization purification to obtain high-purity ferric chloride; the crude vanadium oxytrichloride is subjected to rectification purification and catalytic oxidation to obtain high-purity vanadium pentoxide powder; and with the system and the method, the high-value comprehensive utilization of the high chromium type vanadium residue is achieved, and the high-purity energy storage material for liquid flow batteries is obtained through the one-step chlorination multi-stage recovery method.