Lithium isotope separation by liquid-liquid extraction using ionic liquid system containing dibenzo-14-crown-4

被引：49

作者：

Shi, Chenglong ^{[1
,2
,3
]}

Jia, Yongzhong ^{[1
,2
]}

Xiao, Jiang ^{[1
,2
,3
]}

Wang, Xingquan ^{[1
,2
,3
]}

Yao, Ying ^{[1
,2
]}

Jing, Yan ^{[1
,2
]}

机构：

[1] Chinese Acad Sci, Qinghai Inst Salt Lakes, Xining 810008, Peoples R China

[2] Chinese Acad Sci, Key Lab Comprehens & Highly Efficient Utilizat Sa, Xining 810008, Peoples R China

[3] Univ Chinese Acad Sci, Beijing 100049, Peoples R China

来源：

JOURNAL OF MOLECULAR LIQUIDS | 2016年 / 224卷

基金：

中国国家自然科学基金;

关键词：

Ionic liquids; Solvent extraction; Dibenzo-14-crown-4; Lithium isotopes; ETHER RESIN; BENZO-15-CROWN-5; EFFICIENT; MICROEXTRACTION; ENRICHMENT; STRATEGY; GREEN;

D O I：

10.1016/j.molliq.2016.10.081

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：

In this paper, a novel liquid-liquid extraction system was investigated for the selective separation of lithium isotopes using ionic liquid (IL) and dichloroethane as extraction solvent and dibenzo-14-crown-4 (DB14C4) as extractant. Results showed that the separation performance of DB14C4 has been improved after the ILs were involved in the extraction process. The maximum single stage separation factor alpha for Li-6/Li-7 obtained in the present study was 1.021. The light lithium isotope Li-6 and the heavy lithium isotope Li-7 were concentrated in organic phase and solution phase, respectively. The order of the single stage separation factor obtained in different lithium salts was LiI > LiBr > LiClO4 > LiCl. From the temperature dependence data, the thermodynamic functions values of the lithium isotope exchange reaction were calculated. (C) 2016 Elsevier B.V. All rights reserved.

引用

页码：662 / 667

页数：6

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