Extraction behavior of bifunctional ionic liquid [N1888][SOPAA] and TBP for rare earth elements

Distribution ratios (a) and separation factors (b) of yttrium-enriched REEs in [N1888][SOPAA] system, [N1888][SOPAA] mixed with TBP system. [N1888][SOPAA]=0.5 mol/L; TBP=0.70 mol/L; ΣREEs= 0.22 mol/L; O/A=2; t=30 min; pH=6; T=298 K