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
收藏
页码：662 / 667
页数：6
相关论文
共 50 条
12345