Patent ID: 7513931

Claim:
A method for the separation of dissolved Rh from other dissolved PGMRA metals, comprising converting at least one dissolved PGMRA metals selected from the group consisting of Pt, Pd, Ir, Os, Ru, Re and Au in an acidic aqueous solution to hydroxides by adjusting the acid to pH 8-12, the acidic aqueous solution also containing dissolved Rh; reacidifying the basic solution to 0.1-0.5N HCl including dissolving the PGMRA metal hydroxides; binding the dissolved at least one PGMRA metal selected from the group consisting of Pt, Pd, Ir, Os, Ru, Re and Au in an acidic aqueous solution to extraction material of non-cross linked polyamine composite resin on a substrate including exposing the dissolved at least one PGMRA metal to the extraction material, the dissolved Rh remaining unbound from the extraction material; eluting the dissolved Rh from the extraction material with at least one eluting acid.