Extraction of Rare Earths in Ionic Liquids Via Competitive Ligand Complexation between TODGA and DTPA

被引：7

作者：

Dehaudt, Jeremy ^{[1
]}

Williams, Neil J. ^{[1
]}

Luo, Huimin ^{[2
]}

Dai, Sheng ^{[1
,3
]}

机构：

[1] Oak Ridge Natl Lab, Chem Sci Div, Oak Ridge, TN 37830 USA

[2] Oak Ridge Natl Lab, Energy & Transportat Sci Div, Oak Ridge, TN USA

[3] Univ Tennessee, Dept Chem, Knoxville, TN 37996 USA

来源：

SOLVENT EXTRACTION AND ION EXCHANGE | 2018年 / 36卷 / 06期

关键词：

TODGA; lanthanides; ionic liquids; cation exchange; SOLVENT-EXTRACTION; ELEMENTS; RECOVERY; DIGLYCOLAMIDES; LANTHANIDES; SOLUBILITY; SEPARATION; NEODYMIUM; ACID;

D O I：

10.1080/07366299.2018.1545343

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

With increasing demand and prospective scarcity of rare earths, the capacity to separate these elements with high selectivity is a critical challenge in hydrometallurgy. We evaluate in this article the capacity of N,N,N',N'-tetra-n-octyl diglycolamide (TODGA) to separate lanthanides in both organic solvent and ionic liquids (ILs) using the holdback reagent diethylenetriaminepentaacetic acid (DTPA) in the aqueous phase. Totally, 10 imidazolium-based ILs with various hydrophobicity were studied herein: [C(n)mim][NTf2] and [C(n)mim][BETI] (n =2,4,6,8,10). In this process, selectivity for light lanthanides was obtained owing to a competitive complexation between TODGA and DTPA.

引用

页码：574 / 582

页数：9

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