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etching solution leaching

     

Etching Solution  Leaching, Electrolytic Copper Regeneration System:

The copper leaching process generates a large amount of leaching waste, which contains copper ions (100-170 g/L), ammonia, and sodium chloride. Traditional handling methods involve selling the waste as is by PCB manufacturers, who use it as raw material to produce foam copper and other products via precipitation. However, this method fails to effectively utilize the excess ammonium ions and small amounts of copper ions, leading to resource wastage.

Our Innovative Process:We have adopted a solvent leaching - reverse leaching - electroplating process for the regeneration of leaching waste. This approach uses leaching to separate copper ions from the leaching waste without causing damage, achieving a clean separation. The leach solution is then separated into its components through fractionation. Once the leaching performance is restored, the entire solution is returned to the copper production line for reuse. Finally, we utilize electroplating technology to process the reverse-leached electrolyte, producing copper plates with over 99.5% purity.

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