Preparation method of high-purity copper chloride dihydrate

Abstract

The invention discloses a preparation method of high-purity copper chloride dehydrate. According to the method, hydrochloric acid is added into a basic copper chloride solution for regulating the pH to be 2 to 4; hydrogen peroxide is added; reaction liquid is heated and boiled; chlorides of Al, Bi and Fe are added; basic copper chloride and / or copper oxide are / is used for regulating the pH to be 6.5 to 7.5; filtering is performed; activated charcoal is added into filtrate; heat insulation stirring is performed at 90 to 100 DEG C for 0.5 to 5h; then, filtering is performed; hydrochloric acid is used for regulating the filtrate until the pH is 2 to 3; concentration and crystallization are performed to obtain the high-purity copper chloride dehydrate. The preparation method has the advantages that the operation is simple; the cost is low; the environment-friendly effect is achieved; the purity of the prepared copper chloride dehydrate is high; the impurity metal ion content reaches to ppb grade.

Description

technical field [0001] The invention relates to a method for preparing high-purity copper chloride dihydrate, in particular to a method for preparing high-purity copper chloride dihydrate with limited impurities at ppb level by using industrial basic copper chloride as a copper source. Background technique [0002] Copper chloride dihydrate is mainly used as a chemical reaction catalyst, as a printing and dyeing agent and colorant in the printing and dyeing industry, as a desulfurization, deodorization and purification agent in the petroleum industry, and also as a pesticide, insecticide, wood preservative, water purification and disinfection reagents, analytical reagents and glass, ceramics, pigment production and metal extraction. [0003] At present, the preparation of copper chloride dihydrate mainly adopts the hydrochloric acid method of dissolving copper oxide, basic copper chloride or copper carbonate with hydrochloric acid. [0004] CN103241762A discloses a method f...

AI Technical Summary

Problems solved by technology

The process is simple, but the quality of the prepared product is not high. It can only be used in processes with low requirements for impurities such as wood preservation and pesticides, and cannot be used in high-end technologies such as electronic components, analytical reagents, glass and ceramic mordants and other fine fields. Require

[0006] CN105236465A discloses a preparation method of high-grade pure copper chloride, soaking electrolytic copper with hydrochloric acid, adding hydrochloric acid and water, passing chlorine gas, filtering, heating and concentrating the filtrate to obtain high-grade pure copper chloride, and adding the electrolytic copper to the hydrochloric acid containing electrolytic copper The method of passing chlorine gas, the preparation process is cumbersome, the cost of raw materials is high, the risk is high, and the pollution is serious, so it is not suitable for industrial production

The purity of the prepared copper chloride is more than 98%, and metal impurities such as As and Fe are still at the ppm level, which still cannot meet the needs of more precise industries for purity and impurity limits