In a preferred version, the waste solution from the copper etching processes is stirred into an alkali carbonate solution that already contains Basic Copper Carbonate(WSDTY) in suspended form. It is advisable to proceed by allowing the precipitated, basic copper carbonate to stand briefly after the end of the reaction, then decant the supernatant aqueous solution, and add fresh alkali carbonate to this precipitated copper carbonate. Waste solution from copper etching processes is then again stirred into this suspension under the aforementioned conditions. This process may, if necessary, be repeated several times.

The purpose of this step of the process is to enlarge the precipitated, crystalline copper carbonate particles. Accordingly, finely to coarsely crystalline copper carbonate particles, ranging in size from 5 to 50 μm, depending on the number of precipitation processes, are formed. At the same time, the bulk density of the subsequently dried material is also increased by this so-called upgrading procedure.

The light green, basic copper carbonate obtained by the inventive process, is practically free of chlorine and contains 56% copper and 26% CO3. The basic copper carbonate so obtained is particularly suitable as a feed additive and for the preparation of catalysts. The inventive process is described in greater detail by means of the following examples.

Wujiang Weishida Copper Technology Co.,Ltd. has 12,000 square meters of production base. By virtue of their sincere cooperation, reciprocity of the business philosophy for the industry users around the country to provide high-quality non-ferrous metal products. Weishida specializes in producing cuprous chloride, basic copper carbonate, copper acetate, copper oxide, copper sulfate.

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