Device for regenerating waste microetching liquid and recovering copper

Abstract

The invention discloses a device for regenerating waste microetching liquid and recovering copper. A processed workpiece is formed in a microetching groove by a workpiece to be processed of a circuit board; hydrogen peroxide and sulfuric acid solution are taken as microetching liquid in the process; copper oxide and minute quantity of metallic copper on the surface of the workpiece are removed to lead the concentration of microetching liquid copper ion to be increased into the waste microetching liquid; the remnant hydrogen peroxide in the waste microetching liquid is removed; the copper ion is electrodeposited as the metal copper; and the lost components in the microetching liquid are replenished to qualified microetching liquid which is returned to the regenerating cycle process of the microetching groove. The device overcomes the defects that the waste microetching liquid in the circuit board microetching process of the existing circuit board enterprises is only simply processed to be discharged immediately, the processing procedure has large wastes, and serious resource loss; and the device is suitable for the regenerating cycle of copper-containing waste microetching liquid of the circuit board and the copper recovering in the various circuit board production enterprises.

Description

technical field [0001] The invention relates to a regeneration cycle of waste micro-etching solution produced in the micro-etching process of a circuit board enterprise, in particular to a waste micro-etching solution regeneration and copper recovery device for a new process of energy saving and emission reduction and new technology application. Background technique [0002] For more than 20 years, especially in the past 10 years, the production capacity of my country's circuit board industry has grown at a rate of more than 20% every year. In 2009, it ranked first in the world, and its production capacity has reached 150 million m 2 . However, the pollutants in the circuit board industry are also increasing, and the waste of resources is gradually increasing. With the promulgation of the country's "Promotion of Production Law" and "Circular Economy Promotion Law", the requirements for the circuit board industry are getting higher and higher. Saving resources and reducing ...

AI Technical Summary

Problems solved by technology

[0005] To solve the regeneration cycle problem of the waste microetching solution, the concentration of copper ions in the regenerated microetching solution must be controlled at less than 5g / L. / L; if the concentration of each ion in the microetching solution is too high or too low, the microetching effect cannot meet the process requirements, which will cause defects of unqualified workpiece quality or low production capacity, and the discharged waste microetching solution can only According to the original treatment method, the purpose of regeneration of waste microetching solution and copper recovery cannot be achieved

Images