Acid Etching Fluid Recycling Copper Extraction System

The acid etching fluid recycling copper extraction system is a process that recovers copper metal and chemicals from acid etching processes. Acid etching is a common process used in PCB manufacturing to form circuits. The process uses chemical solvents like copper chloride (CuCl2) or ferric chloride (FeCl3) to etch copper metal into a solution. During the etching process, the Cu2+ ions in the solution transform into Cu+ ions, which form CuCl2 and lose their etching ability.

The recycling system typically involves

• Filtration: Removing particulate matter from the used etching solution.
• Chemical Treatment: Adding chemicals to precipitate out impurities and recover copper.
• Separation: Using methods like centrifugation or settling to separate the copper from the solution.
• Purification: Further treatment is needed to ensure the recovered copper meets the required quality standards.
• Recycling: Reusing the cleaned etching fluid or treating it for disposal.

IEM Working Principle

The process of “ionic membrane electrolytic copper” is adopted. In this process, the anode and cathode of the electrolytic cell are separated into two independent regions by ionic membrane. The anode zone is the waste etching solution regeneration zone, which can generate bivalent copper ions in the waste etching solution after copper reduction through an electrochemical reaction, to regenerate the waste etching solution. The cathode zone is the copper recovery zone. Through the ion diaphragm, the ions in the solution can be selectively migrated, so that the copper ions in the solution can be reduced to copper by electrons.

Acid Etching Fluid Recycling Copper Extraction System(IEM) Features

1. Completely closed loop recycling system, no three waste discharge. At the same time, the waste etching solution is regenerated, and the regenerated etching solution can be recycled.
2. The copper ions in waste etching solution can be recovered and reduced to electrolytic copper powder with high purity and higher copper recovery.
3. High production efficiency, small footprint.