Ionic liquid synergistic cation-exchange system for the selective extraction of lanthanum(III) using 2-thenoyltrifluoroacetone and 18-crown-6

被引：47

作者：

Hirayama, Naoki ^{[1
]}

Okamura, Hiroyuki ^{[2
]}

Kidani, Keiji ^{[1
]}

Imura, Hisanori ^{[1
]}

机构：

[1] Kanazawa Univ, Grad Sch Nat Sci & Technol, Div Mat Sci, Kanazawa, Ishikawa 9201192, Japan

[2] Kanazawa Univ, Grad Sch Nat Sci & Technol, Div Mat Chem, Kanazawa, Ishikawa 9201192, Japan

来源：

ANALYTICAL SCIENCES | 2008年 / 24卷 / 06期

关键词：

D O I：

10.2116/analsci.24.697

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

A novel synergistic extraction system was investigated for the possible selective separation of light lanthanoids using an ionic liquid, 1-butyl-3-methylimidazolium bis(trifluoromethanesulfonyl)imide, as an extraction solvent and 2-thenoyltrifluoroacetone and 18-crown-6 as extractants. Trivalent lanthanum was efficiently extracted as a cationic ternary complex by the cation-exchange process, whereas europium and lutetium showed relatively low extractability without forming respective ternary complexes. This result is thought to originate in a size-fitting effect of 18-crown-6 to lanthanum and the unique nature of the ionic liquid as a chelate extraction solvent.

引用

页码：697 / 699

页数：3

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