Abstract: This paper summarized the separation mechanisms of small molecular organic compounds (such as sugars，amino acids，PEG，dyes) and electrolyte salt with nanofiltration membranes. This paper reviewed the development of the small molecular organic and electrolyte salt mixtures separations. The key factors of the separation of organic/inorganic complex system using nanofiltration technologies，such as separation mechanism，preparation of membranes with high performance，expanding the solute types and different conditions were also discussed. The application of the separation form the complex system by nanofiltration membrane was prospected.

Key words: nanofiltration, small molecular organic compound, salts, retention, membrane separation

摘要： 工业生产中料液体系成分复杂，用纳滤技术对其中小分子有机物及电解质盐实施有效分离越发重要。本文概述了小分子有机物及电解质盐的纳滤分离机制，从纳滤膜分离糖类、氨基酸、染料、PEG等有机小分子及电解质盐混合溶液出发，总结了纳滤技术分离溶液中有机小分子及电解质盐的研究进展，但该体系各溶质截留情况未得出一致结论。同时指出分离机制的研究、高性能膜的制备、扩大溶质种类及不同条件进行试验是纳滤技术分离有机/无机复杂体系的研究方向，并对纳滤技术用于该体系分离的应用前景进行了展望。

关键词: 纳滤, 小分子有机物, 盐, 截留率, 膜分离