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ABSTRACT
This paper details investigations on the conversion of Rh(HI) chlorocomplexes to bromocomplexes, followed by the extraction of the tatter with an alkylated 8-hydroxyquinoline and their subsequent stripping with hydrobromic acid. It was found that in contrast to Rh(III) chlorocomplexes, the analogous bromocomplexes underwent significantly less aquation, thus rendering themselves to qualitative solvent extraction. Of the extractants tested, Kelex 100 proved to give the best performance. On the other hand, stripping was problematic. It was apparent that complex transformation of the extracted Rh(HI) occurred in the organic phase upon aging, which resulted in metal lock up.