The separation of non-RE impurities from RE leach liquor by liquid membrane process

The paper explores the possibility of extracting RE from RE leach liquor by emulsive liquid membrane.The influences of mobile carrier, feed type, inorganic salt, surfactant, aqua-emulsion ratio, NaAc buffer and reuse of membrane on concentrating and separating non-RE imputities(Ca, Mg, Zn, Fe, Pb, Al, Cu, Na)of the extraction of RE by emulsive liquid membrane are studied.The results show that the technique is practicable, the extraction efficiency reach 85 %~ 97 %.The concentration of RE in the enriched solution come up to 40 ~ 90 g/L.The purity of RE oxide is above 99 %.The analytical results of RE oxides obtained by emulsive liquid membrane and ordinary industry method are compared, the results show that emulsive liquid membrane technology improve the quality of the product greatly.