
Keywords: IL, ionic liquid; [T66614][BA], trihexyl(tetradecyl)phosphonium benzoate; [T66614][TFSA], trihexyl(tetradecyl)phosphonium bis(trifluoromethylsulfonyl)imide; REEs, rare earth elements; VOS, volatile organic solventsIL; NdCl3; Liquid–liquid extraction; Stri