Separation of lithium isotopes by crown ether-room temperature ionic liquid-anisole friendly solvent system

doi:10.1016/j.molliq.2021.117207

	Separation of lithium isotopes by crown ether-room temperature ionic liquid-anisole friendly solvent system
	Liu, Bing; Jia, Yongzhong; Zhang, Zezheng; Sun, Huaxin; Yao, Ying; Jing, Yan; Qi, Mixiang; Zhang, Quanyou
第一作者	Liu, Bing
	2021-10-15
发表期刊	JOURNAL OF MOLECULAR LIQUIDS
ISSN	0167-7322
卷号	340
摘要	The solvent extraction separation of lithium isotopes has become of growing interest due to the need for Li-6 and Li-7 isotopes in the nuclear industry. A one-step synthesis of room temperature ionic liquid with low viscosity 1-Ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide GEMIm][NTf2]) (with reaction yields of 87.47%) was used by the ultrasonic method. The addition of ionic liquid [EMIm] [NTf2] in the system significantly improved the extraction efficiency and separation factor compared to the traditional organic solvent anisole for extraction separation of lithium isotopes. The distribution ratio increased from 0.00145 (with the single stage separation factor of 1.024 +/- 0.001) to 0.134 (with the single stage separation factor of 1.034 +/- 0.001). Furthermore, a multi-stage extraction process was intended to enhance lithium isotope separation performance. Each stage of stripping can be considered as an extraction separation equilibrium process, in which the strip liquor from the load organic phase is used for separation in the next stage as the original aqueous solution. The abundance of( 6)Li(+) gradually improved with an increase in the extraction stages. The relative abundance of Li-6(+) increased by 1.492% at the 20-stage extraction separation (from 7.53% to 9.022%). This new and simple approach (stripping cross-flow multistage method (SCFM)) was to achieve large enrichment of lighter isotopes of lithium (Li-6(+) ) by combined extraction and stripping process. In summary, the present study offers the possibility for the enrichment of Li-6(+) during lithium isotope extraction separation. (C) 2021 Elsevier B.V. All rights reserved.
DOI	10.1016/j.molliq.2021.117207
引用统计
文献类型	期刊论文
条目标识符	http://ir.isl.ac.cn/handle/363002/34189
专题	盐湖资源综合利用工程技术中心
推荐引用方式 GB/T 7714	Liu, Bing,Jia, Yongzhong,Zhang, Zezheng,et al. Separation of lithium isotopes by crown ether-room temperature ionic liquid-anisole friendly solvent system[J]. JOURNAL OF MOLECULAR LIQUIDS,2021,340.
APA	Liu, Bing.,Jia, Yongzhong.,Zhang, Zezheng.,Sun, Huaxin.,Yao, Ying.,...&Zhang, Quanyou.(2021).Separation of lithium isotopes by crown ether-room temperature ionic liquid-anisole friendly solvent system.JOURNAL OF MOLECULAR LIQUIDS,340.
MLA	Liu, Bing,et al."Separation of lithium isotopes by crown ether-room temperature ionic liquid-anisole friendly solvent system".JOURNAL OF MOLECULAR LIQUIDS 340(2021).