Selective extraction of platinum,iridium, and palladium with macrocyclic endo-receptors from hydrochloric acid solutions |
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| Authors: | V V Yakshin O M Vilkova I G Tananaev B F Myasoedov |
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| Affiliation: | (1) Department of Analytical Chemistry, Prague Institute of Chemical Technology, Technická 5, 166 28 Prague 6, Czech Republic;(2) Institute of Physical Engineering, University of West Bohemia, Veleslavínova 11, 301 14 Pilsen, Czech Republic |
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| Abstract: | Extraction of Pt, Ir, Pd by the macrocyclic polyethers dibenzo-18-crown-6 (DB18C6) and cis-syncis-dicyclohexyl-18-crown-6 (DCH18C6, isomer A) in organic solvents (chloroform, dichloroethane) from 3–10 M aqueous HCl was studied. It was found that DCH18C6 in dichloroethane
excellently extracted Pt, Ir, and Pd in the presence of KSCN. Re-extraction of Pt, Ir, and Pd from the organic phase can be
fulfilled by 1 M HNO3. Thus, the macrocyclic polyethers are effective reagents for isolation of Pt, Ir, and Pd from HCl solutions. |
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