Alkaline Etch Liquid Extract

Equipment illustration:

PRINCIPLE:

By mixing the imported extractant agent with the etching waste liquid, the copper ions are adsorbed on the extracted oil and then separated from the oil phase through the liquid phase. The oil phase (extracted oil) reacts with sulfuric acid to form copper sulfate and finally enters the electrolytic cell. The extracted regeneration liquid is prepared and reused to the production line to reduce the specific gravity. The extracted oil after the reaction with sulfuric acid reacts with the etched waste liquid in the back extraction tank. A continuous cycle continues.

Engineering flow sheet:

Process characteristics:

1. The etching process does not need to buy new etch liquid, etching waste liquid is completely recycled;
2. Etching waste liquid copper recovery rate of> 99%, the output of copper purity of more than 99.9%, the price is high;
3. The etching quality of the regenerated seed liquid is better.