For various HCl concentrations in the receiving phase，temperatures and Nd3+ concentrations as well as addition of a buffer to the feed，Nd3+ extraction by microemulsion liquid membrane was studied. The results indicated that the water content in nonionic microemulsion increased with increasing HCl concentration. On the contrary

the Nd3+ enrichment concentration in the receiving phase decreased. The highest enrichment of Nd3+ concentration in the receiving phase was 24.3 times

and the extraction percentage was in the range of 70%～80%. Adding a buffer in the feed showed a remarkable effect on Nd3+ extraction. Mass transfer coefficients were calculated according to the kinetics equation of microemulsion liquid membrane extraction. A hydrophilic microporous filtraction membrane was used to isolate microemulsion and feed. Accordingly

the emulsification caused by direct mixing of microemulsion with feed was avoided.At the same time

severe leakage of hydrogen ion from the receiving phase was well controlled.