Abstract: Scandium(Ⅲ) was extracted by the emulsion liquid membrane (ELM)method using 4-benzoyl-3-methyl-1-phenyl-2-pyrazolin-5-on as a carrier. The extraction rate of Sc(Ⅲ) was more than 95.5% and the separation factor for Sc(Ⅲ) and mixed rare earths β_SC/RE was 32.0. The optimum conditions for the extraction as follows:pH=1.7～3.8 for feed liquid, PMBP 0.4%, surfactant Span80.3%, mixed solution of liquid paraffin and kerosene 5%, concentration of HCl in the internal phase 3mol/L, R_oi=1:1,R_we=20:1.

Key words: scandium, mixed rare earth, extraction, separation, emulsion liquid membranemethod, benzoyl-methyl-phenyl-pyrazolidone