Effect of composition and ageing of chloride solutions on extraction of Rh(III) and Ru(III) with phosphonium ionic liquids Cyphos IL 101 and IL 104

Rhodium(III) and ruthenium(III) were extracted from chloride solutions with phosphonium ionic liquids trihexyl(tetradecyl)phosphonium chloride or trihexyl(tetradecyl)phosphonium bis(2,4,4-trimethylpentyl)phosphinate in toluene. Influence of HCl and NaCl presence in the feed and IL concentration in t...

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Bibliographic Details
Published in:Separation science and technology 2018-05, Vol.53 (8), p.1249-1260
Main Authors: Rzelewska, Martyna, Wiśniewski, Maciej, Regel-Rosocka, Magdalena
Format: Article
Language:English
Subjects:
Acidity
Ageing
Chloro-complexes
Composition effects
Feeds
Ionic liquids
Ions
liquid-liquid extraction
Liquids
phosphonium ionic liquids
Rhodium
rhodium(III)
Ruthenium
ruthenium(III)
Sodium chloride
Solutions
Solvents
Toluene
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Summary:Rhodium(III) and ruthenium(III) were extracted from chloride solutions with phosphonium ionic liquids trihexyl(tetradecyl)phosphonium chloride or trihexyl(tetradecyl)phosphonium bis(2,4,4-trimethylpentyl)phosphinate in toluene. Influence of HCl and NaCl presence in the feed and IL concentration in the organic phase were determined. Rh(III) transport appeared to be inefficient, while over 70% of Ru(III) was extracted from 3 M HCl. Ru(III) extraction was affected by the feed acidity and the type of extractant used. The spectra of the extracts indicated some changes in the structure of Rh(III) and Ru(III) complexes in the organic phase. Also, ageing of feed solutions on the extraction of Ru(III) and Rh(III) was studied.
ISSN:0149-6395
1520-5754
DOI:10.1080/01496395.2017.1295996