Titanium anode for copper recovery in etching solution

The production process of the PCB industry produces a large amount of micro-etching liquid, etching liquid, copper nitrate and other metals containing copper and other metals with different concentrations. The recycling value is high, and there will also be a small amount of copper heavy metal in the discharged wastewater.

 

Coating Type: Iridium Tantalum Coating

Usage industry: copper recovery from etching solution

Current density: 200-500A/m²

 

Product usage and introduction:

The production process of the PCB industry produces a large amount of micro-etching liquid, etching liquid, copper nitrate and other metals containing copper and other metals with different concentrations. The recycling value is high, and there will also be a small amount of copper heavy metal in the discharged wastewater. If it cannot be properly treated in an environmentally friendly manner, , on the one hand, it causes a serious waste of resources; on the other hand, after heavy metals are discharged and seep into the soil and water sources, they will cause serious pollution and harm to the natural environment on which we live and our own health.

 

1. Micro-etching liquid

Micro-etching solutions include sodium persulfate/sulfuric acid system and hydrogen peroxide/sulfuric acid system. They have been widely used in PCB surface treatment processes in recent years, such as: copper deposition (PTH) process, electroplating process, inner layer pre-treatment, and green oil pre-treatment. Processing, OSP processing and other production lines, direct electrolysis will damage the anode coating.

 

2. Etching liquid

During the etching process of electronic circuit board (PCB), the copper content in the etching solution gradually increases. To achieve the best etching effect, the etching solution must contain 120 to 180 grams of copper and corresponding amounts of etching salt (NH4CI) and ammonia (NH3) per liter. The etching liquid regeneration circulation system is acidic and alkaline, and the two systems can be divided into extraction method and direct electrolysis method. A large amount of used etching liquid that originally needs to be discharged can be restored and regenerated into regenerated etching liquid that can be used again. Thereby reducing the discharge of production waste liquid, reusing it to reduce production costs, and extracting high-purity electrolytic metal copper.

 

Advantage:

1. High current density and high electrolysis efficiency;

2. High catalytic activity and stable chemical properties;

3. Low initial voltage and low energy consumption;

4. Corrosion resistance and longer life;

5. No pollution, the base material can be reused;

 

Application:

Alkaline etching solution to recover copper

Acid etching solution to recover copper

Micro-etching solution to recover copper