Separation CF The Pake Platinum Group Elements (Rh, Ir, Ru, Os) by Extraction With Sclvating π-Doncr Ucands and Polymers, in the Thiocyanate
- 1 January 1983
- journal article
- research article
- Published by Taylor & Francis in Separation and Purification Methods
- Vol. 12 (2) , 119-141
- https://doi.org/10.1080/03602548308068400
Abstract
The separation of the secondary PGM (Rh, Ir, Ru, Os) complexes in chloride media is very difficult due to the existence of the metal ions in various chemical complexes forms. The formation of the stronger thiocyanate complexes allows a much more consistent extraction behaviour. The extraction of the PGM thiocyanate complexes by π-donor solvating ligands and polymers, such as MIBK, TEP, R3N and Amberlite XAD-7 (a methacrylate type polymeric absorbent) vas studied. The scheme presented is based on the separation of Ru/Os by selective distillation from thiourea solution, followed by formation of the thiocyanate complexes of the residual elements. The PGM thiocyanates are passed on XAD-7, which removes Pd, Pt, and then Rh is separated from Ir by extraction with [Alamine-336] HSCN. The metals are recovered from the thiocyanste solutions by precipitation as sulfides.Keywords
This publication has 2 references indexed in Scilit:
- The Separation of Platinum Group Metals (PGM) in Chloride Media by Isothiouronium ResinsSeparation and Purification Methods, 1980
- Chromatographic separation and colorimetric determination of goldTalanta, 1971