Solvent extraction of rhodium,ruthenium, and iridium with HDEHP |
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| Authors: | G. L. Yan J. Alstad |
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| Affiliation: | (1) Department of Chemistry, University of Oslo, Blindern, P.O. Box 1033, N-0315 Oslo, Norway;(2) Present address: North China University of Technology, 100041 Beijing, P.R. China |
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| Abstract: | Solvent extraction of rhodium, ruthenium, and iridium with HDEHP from thioureachloride media was investigated. Under the conditions ([Cl–]=0.50 M, [HDEHP]=1.0M, [SC(NH2)2]=0.50M, pH=4.50, phase contact time 1 min), Rh(III) is extracted 88.3%, Ru(III) and Ir(III) 40.8% and 28.5% respectively at phase ratio 1 1. The formation of rhodium-thiourea complexes in aqueous solutions, even at 5M chloride concentration, with the possible composition Rh[SC (NH2)2]63+ is confirmed by the observed molar ratio of thiourea to rhodium and UV-spectra. |
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