Electronics &
Communication Technologies -
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
C-2 Qutab Institutional Area
P.O.Box - 4575
New Delhi - 110 016
Tel : 91-11-26966509
Fax : 91-11-26856274
