Copper Recovery (as Copper Sulphate) Process of Spent Etchant from the Manufacturing of Printed Circuit Board

Introduction

A Korean company is offering a technology in which cure process is developed as a method of treating copper-rich spent etchant to recover copper as Copper Sulphate and also reuse the treated clean solution as alkali etchant. Cure offers 99% recovery rate and the purity of 99.9% of Copper Sulphate. It combines hydrochloric and ammonical spent etchant before solvent extraction which facilitate copper recovery. It utilises solvent extraction method using mixer-settler. It consists of 4 steps : extraction, scrubbing, stripping, and solvent regeneration.

Area of Application

Metal industry: applicable for the recovery of non-ferrous heavy metals from waste liquids

Advantages

Simultaneous treatment of hydrochloric and ammonical spent etchants Recycle the treated solution as etchant - size reduction of extraction equipment Clean technology with minimised water pollution Compared to conventional methods, it provides high

Environmental Aspects

waste utilisation

Development Status

Commercialised

For further information please contact

Asian and Pacific Centre for Transfer of Technology
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