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以高同位素效应的苯并-15-冠-5(B15C5)为萃取剂、绿色稳定的1-丁基-3-甲基咪唑双亚胺盐([C_4MIm]NTf_2)离子液体为溶剂(图1),建立了高效分离锂同位素的B15C5-[C_4MIm]NTf_2/LiAH_2O液液萃取分离体系,其中阴离子A分别为双三氟甲基磺酸亚胺根NTf_2~-、三氟甲磺酸根OTf~-和Cl~-。通过前期大量实验证实,本体系具有较高的同位素分离能力,单级分离系数可达1.025~1.045,因此单级分离系数不再是体系考察的重
Using the high isotope effect of benzo-15-crown-5 (B15C5) as extractant and the green-stable ionic liquid of 1-butyl-3- methylimidazolium bisimidate ([C_4MIm] NTf_2) as solvent ), A liquid-liquid extraction and separation system of B15C5- [C_4MIm] NTf_2 / LiAH_2O with high efficiency for the separation of lithium isotopes has been established. Among them, the anion A is NTf_2 ~ - bistrifluoromethanesulfonate, OTf ~ And Cl ~ -. Through a large number of previous experiments confirmed that the system has a higher isotopic separation ability, single-stage separation coefficient of up to 1.025 ~ 1.045, so the single-stage separation coefficient is no longer the weight of the system