Method for preparing and purifying cuprous halide

Abstract

The invention discloses a method for preparing and purifying cuprous halide. The method comprises the following steps of: placing copper halide in a reaction vessel, adding a glycol solvent into the vessel, and keeping the constant temperature of between 130 and 180 DEG C for 24 to 48 hours to produce white cuprous halide grains; and purifying the cuprous halide by a special purifying device; placing the cuprous halide serving as raw materials on the bottom of the purifying device; adding the glycol solvent and a small amount of corresponding alkali halate into the vessel to make the vessel achieve about 90 percent of the degree of filling, and sealing the opening of the vessel by a plug or a cover which is provided with a pore; heating the vessel, keeping the temperature of a lower clapboard on the bottom of the vessel at about 170 DEG C, and keeping the temperature of an upper clapboard on the top of the vessel at about 150 DEG C; and depositing the purified cuprous halide on the surfaces of the clapboards, and washing and drying the cuprous halide deposited on the surface of the upper clapboard to obtain analytically pure cuprous halide. The method has the characteristics of simple equipment and method for synthesis and purification, mild condition, and environmental protection; and the obtained cuprous halide has complete crystalline form, large grain size, high purity, and strong oxidation resistance.

Description

technical field [0001] The patent of the invention belongs to the technical field of inorganic non-metallic materials, and specifically relates to a preparation and purification method of cuprous halide. Background technique [0002] Common cuprous halides include cuprous chloride (CuCl), cuprous bromide (CuBr) and cuprous iodide (CuI), which are an important class of chemical raw materials. Cuprous chloride can be used as the precursor of the insecticide cupric oxychloride; in the presence of aluminum chloride, cuprous chloride can absorb carbon monoxide, and this reaction is widely used in the ammonia synthesis industry; cuprous chloride can also be used as an organic reaction Catalysts, for example: (1) it can carry out 1,4-addition to α, β-unsaturated ketone together with Grignard reagent; (2) in the Sandmeyer reaction, use cuprous chloride (or bromide Cuprous) treatment of aromatic diazonium salts can give chlorinated aromatics (or brominated aromatics). Cuprous bromi...

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Problems solved by technology

[0004] Each of the above methods has its shortcomings, for example: the direct reaction method needs to be completed under high temperature conditions, the equipment and process are more complicated, and the energy consumption is large; the monovalent copper salt hydrolysis method and the replacement method have a large amount of waste water in the reaction process, It not only pollutes the environment but also causes waste; some hydrolysis processes need to be completed under high temperature and high pressure, the equipment is complex, energy-consuming, and unsafe

The divalent copper salt reduction process is relatively simple, but the cost is high, and the prepared product has small particles, which are easily oxidized during post-processing and use.

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