Electrorefining of copper from a cuprous ion complexing electrolyte. I. Initial evaluation of potential for energy savings

Abstract

On the basis of information available in the literature, the energy-saving potential of copper electrorefining with electrolytes in which cuprous ion complexes are stable was examined. Three alternative aqueous electrolyte systems were investigated: ammonia solutions, acid chloride solutions, and acetonitrile-sulfuric acid solutions. An energy saving of up to 75% under ideal conditions was predicted. Because of deficiencies present in the available literature, no definitive conclusions could be reached regarding the practical applicability of this energy-saving technology. A program of further experimental research is recommended.