The Study of Extraction Rare Earth by Liquid Surfactant Memberance with New Extraction Cyanex272 as Carrier

：The optimum comstituents of emulsion mebrance and the optimal operation conditions in extraction rare earth by liquid surfactant mebrance with new extraction agent Cyanex272 as carrier have been investigated according to the constituts and condition， the enriching rare earth from the leaching solution of southern ion－absorbing rare earth has been inspected， and the mixed carrier was bottered． The results showed that it is effective to enrich rare earth from leaching solution with new extraction agent cyanex272 as carrier， the concentration of the enriched rare in aqueous phase is up to 90g／L （calculated in RE_2O_3），the recovery is 98％，the purity is over 97％．