Influence of tin(II) chloride on the solvent extraction of platinum group metals with N,N-di-n-hexyl-N'-benzoylthiourea |
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Authors: | P. Vest, M. Schuster K. -H. Kö nig |
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Affiliation: | (1) Institut für Anorganische Chemie der Universität, Niederurseler Hang, W-6000 Frankfurt/Main 50, Federal Republic of Germany |
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Abstract: | Summary The solvent extraction of Rh(III) and Pt(IV) with N,N-di-n-hexyl-N'-benzoylthiourea (DHBT)/toluene is substantially accelerated in the presence of tin(II) chloride. Low concentrations of SnCl2 from 0.02 to 0.03 mol/l and metal/ligand ratio of 1:4 (Pt) resp. 1:9 (Rh) lead to low residual metal concentrations below the detection limit of GFAAS. The extraction behaviour of Pt(II), Ru(III) and Ir(III) is not affected by the treatment with SnCl2. |
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