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
APCTT Building
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P.O.Box - 4575
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Tel : 91-11-26966509
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