Patent ID: 7163570
Filing Date: 2007-01-16
Classification: B01D,B01J,C22B,G01N,Y02P

Abstract:
1. A method for the interseparation of ruthenium, rhodium and iridium metals from a feed solution containing chlorocomplexes of these metals, the method comprising passing said solution through at least one chromatography column containing an absorbent, and the steps of: (a) ensuring that ruthenium is present on the column as at least one of the following species: [Ru(NO)Cl (b) ensuring that iridium is present on the column as a tetravalent species; and, (c) applying an oxidizing eluent to the at least one column thereby effecting the elution of the metal chlorocomplexes, separately from one another and in the order rhodium, ruthenium, iridium.