Patent ID: 11939229
Assignee: CENTRAL SOUTH UNIVERSITY
Field: Environmental technology (Chemistry)
Classification: CPC C | IPC C

Claim 3:
4. The method according to claim 3, wherein the step S4 also comprises:
adding the ammonia solution into the basic copper chloride solids for alkaline dissolution to obtain copper hydroxide precipitates and an ammonium cupric chloride solution;
refluxing the ammonium cupric chloride solution into the low-impurity alkaline waste etching solution to take part in the first agglomeration reaction as the ammonium-containing solution together with the low-impurity alkaline waste etching solution; and
making the copper hydroxide precipitates react with sulfuric acid to obtain a copper sulfate mixed solution; and then evaporating, concentrating, cooling and crystallizing the copper sulfate mixed solution obtained by the reaction of the copper hydroxide precipitates and the sulfuric acid to obtain copper sulfate pentahydrate solids.