Recovery and Separation of Platinum Group Metals Using Impregnated Resins Containing Alamine 336

The kinetics and equilibrium extraction of pd(II) pt(IV) and RH (III) from hydrochloric acid media using impregnated resins containing Alamine 336 impregnated onto Amberlite XAD2 were studied and compared. While Rh( III) was hardly extracted, Pd( II) and Pt( IV) extraction could be explained by the formation of ( R3 NH+ )2 MCLn − 2 complexes: n= 4 for Pd( H) and n= 6 for Pt( TV) Stripping and concentration of the extracted PGMs were assayed with HC1, HC104 and thiourea. Straightforward metal separations were designed on the basis of the results obtained in the single metal experiments, and selective co-extraction of Pd( II) and Pt( TV) from Rh( III)at low HC1 concentrations, as well as partial separation between Pd( ll) and Pt( IV) at high acid concentrations, were achieved.