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
收藏
页码：9663 / 9669
页数：7
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