Collect. Czech. Chem. Commun. 1987, 52, 316-321

Separation of platinum(IV) and rhenium(VII) in the process of working-up of deactivated reforming catalysts

Eliška Kálalová, Marcela Bumbová and Libor Mastný

Department of Inorganic Chemistry, Prague Institute of Chemical Technology, 166 28 Prague 6


A procedure is suggested for the isolation of Pt(IV) and Re(VII) from solutions after the working-up of exhausted catalysts for the reforming of hydrocarbons, which in addition to the catalytically active Pt and Re contain Fe and Ti on Al2O3 as promotors. The solution is passed through a column packed with a glycidyl methacrylate chelating sorbent containing ethylenediamine functional groups; while Fe3+, Ti4+, and Al3+ cations pass freely, [PtCl6]2- and ReO4- anions are retained by the column; they are subsequently separated by gradual elution, Re(VII) first with 1-3M-H2SO4, then Pt(IV) with 2-5M-HNO3. Complexes of Pt(IV) with the polymeric ligands, forming during the separation, are identified by means of their infrared and electronic reflection spectra.