Copper etching waste liquid copper ion treatment and recovery method

Abstract

The present invention provides a method for treating and recovering copper ions in copper etching waste liquid. The treatment and recovery method includes extraction reaction, regeneration reaction, electrolytic treatment and recovery treatment. Through the above treatment process, complex components of copper etching (copper acid) waste liquid can be eliminated. The interference of the direct electrolytic recovery method first converts the copper ions in the waste liquid into a regenerated copper sulfate solution, and then performs the electrolytic recovery method to process and recover the copper ions in the copper etching (cupric acid) waste liquid into valuable metal copper.

Description

technical field [0001] The invention relates to a treatment method for recovering valuable metals from waste liquid, in particular to a method for treating and recovering copper ions from copper etching waste liquid. Background technique [0002] With the increasingly stringent environmental protection regulations on the treatment of industrial wastewater, many industrial wastewater must use more advanced treatment procedures, high-energy-consuming treatment procedures or newly invented treatment methods in order to meet the specified discharge standards. [0003] Among them, the copper etching (copper acid) waste liquid produced by the optoelectronic industry has been transformed from the original aluminum process to a copper process in recent years with the improvement of image resolution and additional functions in panel manufacturing, and copper etching (copper acid) has begun to occur. copper acid) waste liquid. This is a brand new waste solution. Due to the special re...

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Problems solved by technology

However, the complex composition of copper etching (copper acid) waste liquid makes the treatment of this copper-containing waste liquid or further copper treatment and recovery more difficult.

[0005] Furthermore, since the copper etching (copper acid) waste liquid in the optoelectronic industry contains complex components, if the direct electrolytic recovery method is used for copper recovery, many of the components (hydrogen peroxide / organic acid...) will not only interfere with the direct electrolytic recovery method Therefore, the method of electrolytic treatment and recovery of copper etching (copper acid) waste liquid cannot successfully achieve the purpose of efficiently removing copper ions and processing and recycling them into valuable metal copper.

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