Extraction Of Light Rare Earth Metals Using Nonionic Water-in-Oil Microemulsion In Hollow Fiber Membrane

Microemulsion is an optically isotropic, transparent, and thermodynamically stable system formed spontaneously from surfactants, cosurfactants, oil and water or aqueous solution.A novel extraction technique using W/O nonionic microemulsion within a hollow-fiber-contactor(HFC) for the extraction and enrichment of lanthium, cerium, praseodymium, neodymium were carried out in this paper. The light rare earth extraction using W/O nonionic microemulsion within a hollow-fiber-contactor(HFC) under various conditions such as the ratio of flow rate of feed aqueous to microemulsion, HCL concentration, the feed concentration and the temperature and the extracted time were studied. The permeate flux, the permeate coefficient and the permeate activate energy of La³⁺ and the mass transfer coefficients were also calculated. The major conclusions were obtained as follows:...