A PROCESS FOR THE RECOVERY OF ARSENIC AS ZINC ARSENATE FROM CEMENT COPPER CAKE AND A PROCESS FOR THE PURIFICATION OF AN IMPURE ZINC ELECTROLYTE USING ZINC ARSENATE SO OBTAINED

摘要

A process for purifying an impure zinc electrolyte containing copper, cadmium and cobalt impurities comprising treating the impure zinc electrolyte with zinc dust and zinc arsenate to provide a cement copper cake precipitate and a filtrate comprising a purified electrolyte solution suitable for use in electrochemical deposition processes, the zinc arsenate being obtained by recovery from the cement copper cake residues.