Separation of cobalt and nickel by solvent extraction with two mutually immiscible ionic liquids

被引：58

作者：

Wellens, Sil ^{[1
]}

Thijs, Ben ^{[2
]}

Moller, Claudia ^{[2
]}

Binnemans, Koen ^{[1
]}

机构：

[1] KU Leuven Univ Leuven, Dept Chem, B-3001 Heverlee, Belgium

[2] Umicore, Res & Dev Grp, Competence Area Recycling & Extract Technol, B-2250 Olen, Belgium

来源：

PHYSICAL CHEMISTRY CHEMICAL PHYSICS | 2013年 / 15卷 / 24期

关键词：

CHLORIDE SOLUTIONS; MIXTURES; PHOSPHONIUM; PALLADIUM(II); LANTHANIDES; METALS; GOLD;

D O I：

10.1039/c3cp50819f

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The proof-of-principle for the separation of metals by solvent extraction using two mutually immiscible ionic liquids is given. Cobalt was extracted from the ionic liquid 1-ethyl-3-methylimidazolium chloride to the ionic liquid trihexyl(tetradecyl)phosphonium bis(2,4,4-trimethylpentyl)phosphinate. A distribution ratio of 44 was obtained. Cobalt could be selectively separated from nickel, with a separation factor of 207. The extraction mechanism was elucidated using UV-VIS absorption measurements. The mutual solubility between the two ionic liquids was determined by H-1 NMR. Processing steps such as washing, stripping and regeneration of the ionic liquid phases are discussed.

引用

页码：9663 / 9669

页数：7

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