METHOD FOR SEPARATING Ru, Rh AND Ir FROM SUBSTANCE CONTAINING SELENIUM AND PLATINUM GROUP ELEMENTS

摘要

PROBLEM TO BE SOLVED: To provide a method for efficiently separating Ru, Rh and Ir from a substance containing selenium and platinum group elements.SOLUTION: The method for separating Ru, Rh and Ir from a substance containing selenium and platinum group elements comprises: an alkali treatment step of adding a flux being a mixture of sodium hydroxide and sodium nitrate to a substance containing selenium and platinum group elements composed mainly of Se, Pt, Pd, Ru, Rh and Ir in which Pt, Pd and Ru are bonded mainly to Se to form a selenium compound and melting the substance to produce a me and an acid leaching step of subjecting the melt to acid leaching treatment and after that performing solid-liquid separation to produce a solid including Ru, Rh and Ir and a liquid including Se, Pt and Pd.SELECTED DRAWING: None