Reextraction of Pt, Rh, Ir, Ru from Organic Sulphides Using Ultra-Violet Light Treatment
V. V. PATRUSHEV, L. P. BULGANINA, T. N. PATRUSHEVA and S. V. OSTANOVA
Institute of Chemistry and Chemical Technology, Siberian Branch of the Russian Academy of Sciences,
Ul. K. Marksa 42, Krasnoyarsk 660049 (Russia) E-mail: pat@ire.krgtu.ru
Pages: 627-632
Abstract
Results of investigations into reextraction of Pt, Ir, Rh and Ru from organic sulphides by water solutions of a number of reagents by the action of the ultra-violet (UV) light have been presented. It has been demonstrated that the UV light has a pronounced effect upon the reextraction of platinum metals. Separating of Rh and Ru from Pt and Ir by a muriatic acid solution of sodium and ammonium nitrates and rongalite has been performed. The UV light irradiation of a system of an extract of organic sulphides and muriatic acid makes it possible to separate iridium from the other platinoids and to reextract rhodium selectively by a sodium hipochlorite solution. The activation mechanism of the reextraction process upon irradiation by the UV light is discussed, which consists in a labilization of the complexes and in the reduction of a central atom to lower
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