Thiourea stripping of rhodium from organic phases resulting from extraction with a mixture of dialkyl sulfide and alkylanilinium nitrate from acid nitrate-nitrite aqueous solutions of triaquatrinitrorhodium(III)

In continuation of our studies on the extraction of rhodium from acid nitrate-nitrite aqueous solutions with a mixture of alkylanilinium nitrate and dialkyl sulfide, a back-extraction of rhodium was studied. Thiourea (TU) is an efficient agent for the back-extraction of rhodium and concomitant noble...

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Published inRussian journal of inorganic chemistry Vol. 57; no. 10; pp. 1398 - 1404
Main Authors Tatarchuk, V. V., Druzhinina, I. A., Korda, T. M., Malkova, V. I., Sheludyakova, L. A., Plyusnin, P. E.
Format Journal Article
LanguageEnglish
Published Dordrecht SP MAIK Nauka/Interperiodica 01.10.2012
Subjects
Chemistry
Chemistry and Materials Science
Inorganic Chemistry
Physical Chemistry of Solutions
Thiourea
Chloride System
Palladium
Back Extraction
Rhodium
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Summary:In continuation of our studies on the extraction of rhodium from acid nitrate-nitrite aqueous solutions with a mixture of alkylanilinium nitrate and dialkyl sulfide, a back-extraction of rhodium was studied. Thiourea (TU) is an efficient agent for the back-extraction of rhodium and concomitant noble metals (Pd, Ru, Ag). The back-extraction of rhodium proceeds via coordination mechanism, [Rh(tu) 6 ](NO 3 ) 3 being the major product. Aqueous 1 mol/L solution of TU ensures stripping of at least 91% rhodium and provides its relative concentrating up to 4 times (time of phase contact is 5 min, temperature 20–35°C). The presence of palladium and other noble metals in extract does not affect the Rh stripping.
ISSN:0036-0236
1531-8613
DOI:10.1134/S0036023612050221