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设计了含２－乙基己基所区单２－乙基已基酯的中空纤维管夹心型支撑液膜体系，并研究了Ｌａ（３＋）在该体系中的迁移行为。实验得出该体系液膜传质渗透系数ρ的数学表达式，测定了体系中Ｌａ（３＋）传质渗透系数ρ及其影响因素；该体系在料液ｐＨ≥４时，Ｌａ￣（３＋）的传质渗透系数ρ趋于稳定，随着体系反萃酸度的增加，ρ值略有增加。与同类中空纤维管支撑菠膜体系相比，该体系对稀土元素有较强的富集能力，且稳定性较好。
A hollow fiber tube sandwich supported liquid membrane system containing 2-ethylhexyl mono-ethyl ester was designed and the migration behavior of La (3+) in the system was studied. The mathematical expression of the mass transfer coefficient ρ was obtained experimentally. The mass transfer coefficient ρ and its influencing factors of La (3+) in the system were determined. Of the mass transfer coefficient ρ tends to be stable, with the increase of system stripping acidity, ρ value increased slightly. Compared with the same hollow fiber tube supported spinach membrane system, the system has strong enrichment ability for rare earth elements and has good stability.