Extraction and separation of iridium(IV) and rhodium(III) from hydrochloric acid media by a quaternary ammonium-based hydrophobic eutectic solvent

被引：15

作者：

Zakusilova, Vira ^{[1
,2
]}

Zante, Guillaume ^{[1
,3
]}

Tereshatov, Evgeny E. ^{[2
]}

Folden Iii, Charles M. ^{[2
,4
]}

Boltoeva, Maria ^{[1
]}

机构：

[1] Univ Strasbourg, CNRS, IPHC, UMR 7178, F-67000 Strasbourg, France

[2] Texas A&M Univ, Cyclotron Inst, College Stn, TX 77843 USA

[3] ADEME, 20 Ave Gresille, F-49004 Angers 01, France

[4] Texas A&M Univ, Dept Chem, College Stn, TX 77843 USA

来源：

SEPARATION AND PURIFICATION TECHNOLOGY | 2022年 / 278卷

关键词：

Solvent extraction; Hydrophobic eutectic solvent; Iridium(IV); Rhodium(III); Quaternary ammonium salt; Fatty acid; PLATINUM-GROUP METALS; LIQUID-LIQUID-EXTRACTION; IONIC LIQUIDS; CHLORIDE SOLUTIONS; INDIUM EXTRACTION; MIXTURES; RH(III); SPECIATION; COMPLEXES; IR(IV);

D O I：

10.1016/j.seppur.2021.118814

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

The extraction and separation of iridium(IV) and rhodium(III) from hydrochloric acid solutions by a hydrophobic eutectic solvent composed of tetraheptylammonium chloride and decanoic acid have been studied for the first time. This eutectic solvent selectively extracts iridium(IV) over rhodium(III), the highest separation factor obtained is approximately 20. The effects of the main experimental factors (shaking time, the volume ratio of aqueous to organic phase, hydrochloric acid concentration, and the initial metal concentration in the aqueous phase) on the extraction behavior of iridium(IV) and rhodium(III) have been investigated. Ultraviolet-visible (UV-Vis) spectroscopy was applied to reveal the [IrCl6]2- complex to be a predominant species attributed to iridium(IV) extraction. To understand the underlying extraction mechanism, the initial iridium(IV) concentration in the aqueous phase has been varied and a corresponding mathematical model has been developed.

引用

页数：8

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