The effect of ionic liquids as co-extractant with crown ether for the extraction of lithium in dichloromethane-water system

doi:10.1016/j.molliq.2019.04.046

CORC > 青海盐湖研究所 > 中国科学院青海盐湖研究所 > 盐湖资源综合利用工程技术中心

	The effect of ionic liquids as co-extractant with crown ether for the extraction of lithium in dichloromethane-water system
	Zhu, Wenbo; Jia, Yongzhong; Zhang, Quanyou; Sun, Jinhe; Jing, Yan; Li, Jie
刊名	JOURNAL OF MOLECULAR LIQUIDS
	2019-07-01
卷号	285 页码:75-83
ISSN号	0167-7322
DOI	10.1016/j.molliq.2019.04.046
英文摘要	With different anionic and cationic structures of ionic liquids influencing the efficiency of Li+ extraction, 16 different kinds of ionic liquids with the crown ether-dichloromethane system were investigated primarily. The experimental results showed that smaller relative molecular weight, hydrophobicity, uniform electron distribution on cation, and weak electron donating on anion of ionic liquids with the ligand crown ether promoted the highest extraction of lithium ions in the dichloromethane-water system. The extraction system with [BMIm][NTf2] had the largest extraction rate and distribution coefficient at 26.35% and 0.358, respectively. Cation exchange behavior between Li+ in the aqueous phase and [BMIm](+) in the organic phase was examined through fitting the line of Li+ concentration in the organic phase and [BMIm](+) concentration in the aqueous phase. The anion of (BMIm] [NTf2] coordinating with the cationic lithium-crown ether complex in the organic phase was also verified by infrared spectroscopy. For the thermodynamic studies in the system using [BMIm][NTf2] and crown ether, the extraction process of Li+ was an exothermic spontaneous reaction while lower temperature was beneficial to lithium extraction. (C) 2019 Elsevier B.V. All rights reserved.
内容类型	期刊论文
源URL	[http://ir.isl.ac.cn/handle/363002/34067]
专题	青海盐湖研究所_盐湖资源综合利用工程技术中心中国科学院青海盐湖研究所
推荐引用方式 GB/T 7714	Zhu, Wenbo,Jia, Yongzhong,Zhang, Quanyou,et al. The effect of ionic liquids as co-extractant with crown ether for the extraction of lithium in dichloromethane-water system[J]. JOURNAL OF MOLECULAR LIQUIDS,2019,285:75-83.
APA	Zhu, Wenbo,Jia, Yongzhong,Zhang, Quanyou,Sun, Jinhe,Jing, Yan,&Li, Jie.(2019).The effect of ionic liquids as co-extractant with crown ether for the extraction of lithium in dichloromethane-water system.JOURNAL OF MOLECULAR LIQUIDS,285,75-83.
MLA	Zhu, Wenbo,et al."The effect of ionic liquids as co-extractant with crown ether for the extraction of lithium in dichloromethane-water system".JOURNAL OF MOLECULAR LIQUIDS 285(2019):75-83.