SU165429A1 - METHOD OF OBTAINING SINGLE-CHLORINE COPPER - Google Patents

Description

Methods are known for producing copper monochloride by reducing solutions of copper sulfate and sodium chloride with metallic copper at a temperature of 70-80 ° C. The resulting solution containing copper monochloride as a complex with an excess of sodium chloride is diluted with acidified water or cooled to precipitate copper monochloride. The precipitated monochloride copper is filtered off, washed and dried by known methods. When this method is dried, the coefficient of use of CuSO4 is 590/0, and metallic copper is 64%. In addition, due to the impossibility of returning to the cycle mother liquors containing SO / ions, it is impossible to carry out the process continuously.

For the purpose of full use of copper introduced into the process (both in the form of sulphate and metal) and the possibility of carrying out the process continuously, it was proposed to obtain copper monochloride by reducing solutions of copper vitriol and alkaline earth metal chlorides, for example CaCl2 and BaCi.

The process is carried out as follows.

One of the stripped hot mother liquor, obtained after separation of the precipitate of copper chloride, is fed into the mixer, in which a new porous of the original

calcium chloride and a hot solution of copper sulphate. The amount added to the mother liquor must be equal to the technoolpium strength needed for the exchange decomposition reaction with CuSO.i, since the mother liquor already contains an excess of CaClo needed to keep the copper monochloride in solution. The resulting after mixing of the CaSO solutions is almost complete.

goes into sediment. The precipitate is separated on a filter, after which the liquor should contain 210-265 g / l CuCia, 400-500 g / l CaCl. and some amount of CuCl injected with circulating mother liquor (20-30 g / l).

After filtration, the solution is fed to a reducing column filled with hollow copper granules or copper chips. Recovery is carried out at a temperature of 70-80 ° C. With a reduction degree of 95%, the recovered solution coming out of the colostrum contains 400-500 g / l CaCl ,, 315-400 g / l CuCl and 11-15 g / l CuOU. In this case, CuCl is retained when reduced in solution in the form of the complex xCaCU-yCnCl. After separating it from mechanical impurities, the reconstituted solution is diluted with water, slightly acidified with hydrochloric acid (1 g / l HCl) or cooled to room temperature. Monochloride copper in this falls in

watered and dried using conventional methods. The diluted mother liquor is recycled. The proposed method makes it possible to fully utilize the copper introduced into the process (both in the form of sulfate and metal) and to conduct the process continuously by removing SO / ions from the solution.

Subject invention

A method for producing copper odpochloride and recovering a copper copper solution and complexing metal chloride with metallic copper at a temperature of 70-80 ° C with further separation of copper monochloride from the complex into a precipitate, filtering, washing and drying the copper cobalt precipitate, which is designed to intensify the process , alkaline earth metal chlorides, for example CaCla or BaCls, are used as complexing chloride.