METHOD FOR SEPARATING PLATINUM GROUP ELEMENT

摘要

PROBLEM TO BE SOLVED: To provide a method for separating a platinum group element in which a solvent extraction effect of the platinum group element is heightened when the platinum group element is separated from a platinum group element-including solution by solvent extraction.SOLUTION: The method for separating the platinum group element comprises the steps of: adjusting the ratio (M1/M2) of the total molar concentration (M1) of coexistent metals of Bi, Sn and Pb to the total molar concentration (M2) of platinum group elements to ≤1; and extracting the platinum group elements. As the platinum group element-including solution, a liquid is used which is obtained by subjecting copper electrolysis slime to hydrochloric acid leaching, separating gold from an obtained leachate, introducing sulfurous acid gas into a gold-separated solution to perform reduction treatment and produce a solid and leaching the produced solid with an acid and an oxidizer.