Abstract The organic liquid film extraction system, a novel extraction system, was investigated for the extraction and separation of lithium isotopes using ionic liquid as the co-extractant and Dibenzo-15-crown 5-Ether (DB15C5) as the extractant. Multiple subjects were studied during the investigation, including the effects of extraction time; gas flow rate; temperature; counter anions of lithium salt; the length of the cationic carbon chain of ionic liquid on extraction, and separation of lithium isotopes. The maximum separation factor α was 1.037 ± 0.002 and the abundance of 6Li increased from 7.61 % to 7.86 %. Based on the slope analysis method, the formation of 1:1 complex [Li (DB15C5)]+ in the extraction phase was determined. The exchange of lithium isotope is spontaneous reaction at low temperatures (ΔH

中文翻译：

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冠醚-离子液体有机液膜萃取系统萃取分离锂同位素

摘要 以离子液体为共萃取剂，二苯并15-冠5-醚(DB15C5)为萃取剂，研究了一种新型萃取体系——有机液膜萃取系统，用于锂同位素的萃取分离。在调查过程中研究了多个对象，包括提取时间的影响；气体流量；温度; 锂盐的抗衡阴离子；离子液体阳离子碳链的长度对锂同位素的提取和分离。最大分离因子 α 为 1.037 ± 0.002，6Li 的丰度从 7.61 % 增加到 7.86 %。基于斜率分析方法，确定了萃取相中 1:1 配合物 [Li (DB15C5)]+ 的形成。锂同位素的交换是低温自发反应（ΔH