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分别以苯并１２－冠－４（Ｂ１２－Ｃ－４）、苯并１５－冠－５（Ｂ１５－Ｃ－５）、苯并１８－冠－６（Ｂ１８－Ｃ－６）和二苯并１８－冠－６（ＤＢ８－Ｃ－６）为离子载体，磷酸三丁酯（ＴＢＰ）或邻苯二甲酸二丁酯（ＤＢＰ）为增塑剂，聚氯乙烯（ＰＶＣ）为基质，制备了冠醚－ＴＢＰ（ＤＢＰ）－ＰＶＣ固态膜（ＣＴＰ膜）．实验考察了各种膜对碱金属盐混合溶液中Ｍ＋电渗析膜输送的特性．实验表明，随冠醚环腔半径增加和溶液中Ｍ＋浓度降低，对Ｌｉ＋膜渗析的选择性降低．以Ｂ１２－Ｃ－４－ＴＢＰ－ＰＶＣ为渗析膜，将一次渗析液浓缩后再次渗析，可获得较好的分离锂离子的效果
(B12-C-4), benzo 15-crown-5 (B15-C-5), benzo 18-crown- 6 (B18-C-6) and dibenzo 18-crown-6 (DB8-C-6) as an ionophore, tributyl phosphate (TBP) or dibutyl phthalate (DBP) as plasticizer and polyvinyl chloride (PVC) Crown ether-TBP (DBP) -PVC solid film (CTP film). The characteristics of various membranes transported by M + electrodialysis membrane in alkali metal salt mixed solution were investigated experimentally. Experiments show that with the increase of crown ether ring cavity radius and the concentration of M + in solution, the selectivity of Li + membrane dialysis decreases. Using B12-C-4-TBP-PVC as a dialysis membrane, the dialysate was concentrated and dialyzed again to obtain a better effect of separating lithium ions