Patent ID: 7294168
Filing Date: 2007-11-13
Classification: C22B,Y02P

Abstract:
1. A method for the removal of copper(II) chloride from a mainly copper(I) chloride solution, said solution having been formed by countercurrently leaching a sulfidic copper raw material into a chloride-bearing solution, said method comprising; a) removing the copper(II) chloride contained in said solution by precipitation under atmospheric pressure as, at least partly, alkaline copper(II) chloride, resulting in a solution comprising copper(I) chloride; b) conducting said copper(I) solution of step a) to further treatment for producing metallic copper; and c) leaching said alkaline copper(II) chloride of step a) to form a solution comprising copper(II) chloride, and conducting said copper(II) chloride solution to said sulfidic copper raw material leaching.