Extraction and separation of lithium isotopes by using organic liquid film extraction system of crown ether-ionic liquid

Study of Lithium-Extraction Systems Based on Benzo-15-Crown-5 Ether and Alkylimidazolium-Based Ionic Liquid

“…As was reported in [ 9 , 10 , 11 ], the use of different lithium salts affects the extraction efficiency, isotope separation, and crown ether distribution between phases. Analysis of a number of lithium salts (LiCl, LiBr, LiI, LiClO 4 , and LiSCN) in systems with benzo-15-crown-5 (B15C5)–chloroforms (CHCl 3 ) [ 10 ] showed that as the anion radius and its lipophilicity increase, there is an increase in the distribution coefficient of lithium.…”

“…When lithium salts with different anions (CF 3 COOLi, LiNO 3 , LiBr, LiI, LiCl, LiClO 4 , and LiNTf 2 ) extracts by the DB15C5–[C6mim][NTf 2 ]-anisol mixture [ 11 ], the different extractabilities of lithium are observed; however, the different extractability of lithium is observed, however the difference in isotope effects negligible. The maximum distribution coefficients of lithium are characteristic of the system with LiNTf 2 .…”

A Comprehensive Review of Selected Major Categories of Lithium Isotope Separation Techniques

“…In ionic liquids, the overall single-stage separation factor obtained was 1.021 and the light lithium isotope 6 Li and the heavy lithium isotope 7 Li were localized in the organic phase and solution phase, respectively. As ionic liquid at room temperature has the benefits of stable physical and chemical properties, low vapor pressure, low toxicity, simple nonvolatility and a designable structure, and an environmentally safe organic solvent, [27] significant attention has been paid to metal extraction and has been used in recent years for lithium isotope separation. The findings demonstrated that using DB15C5 as an extractant, [HMIm][NTf2] as a coextractant, and anisole as a diluent to create an organic extraction phase, which is implied to be an effective system for extraction and separation of lithium isotopes, and using an organic liquid film method to separate lithium isotopes is an efficient strategy.…”

“…The maximum separation factor α was 1.037 and the abundance of 6 Li increased from 7.61 % to 7.86 %. [27] 3. Displacement Chromatography…”

“…In addition, the single‐stage separation increased to 1.038 in the ionic liquid–chloroform mixed‐solvent solution comprising B15C5. Recently, the novel form of organic liquid film was analyzed by Zhang et al [ 27 ] To produce an organic extraction phase, DB15C5 was used as the extractant, ionic liquid as the coextractant, and anisole as the diluent, and lithium ions in the aqueous phase were recovered and isotopically separated using the organic liquid film method. To form tiny organic liquid bubbles, this process transmits gas into the organic extraction phase.…”