应用化学 ›› 1992, Vol. 0 ›› Issue (6): 89-91.

• 研究简报 • 上一篇    下一篇

磺化聚乙烯中空纤维离子交换膜渗透汽化分离异丙醇/水混合液研究

李文俊, 薛碚华   

  1. 复旦大学材料科学系, 上海 200433
  • 收稿日期:1991-12-04 修回日期:1992-05-04 出版日期:1992-12-10 发布日期:1992-12-10
  • 基金资助:
    上海市自然科学基金

PERVAPORATION SEPARATION OF ISOPROPANOL/WATER MIXTURE BY SULFONATED POLYETHYLENE HOLLOW FIBER ION-EXCHANGE MEMBRANE

Li Wenjun, Xue Peihua   

  1. Department of Material Science, Fudan University, Shanghai 200433
  • Received:1991-12-04 Revised:1992-05-04 Published:1992-12-10 Online:1992-12-10

摘要: 离子交换膜作为醇/水和其他有机水溶液的渗透汽化分离膜有很好的选择性[1-3]。其中尤以磺化聚乙烯离子交换膜最为显著。用磺化聚乙烯离子膜分离恒沸组成的异丙醇/水和乙醇/水(85:15wt%)混合物[4]、近恒沸组成的二氧六环/水混合物[5],透过物中水含量大于99%,而且保持了较高的渗透通量。但上述实验均使用的平板型膜,大型平板膜组件的加工制造昂贵而困难,况且膜在分离运行过程中会随料液浓度的变化发生溶胀与收缩,使固定的平面膜起皱在收缩时又可能被拉破。为了提高单位组件内的膜面积(中空纤维组件的膜装填密度为平板式的60-100倍),发展中空纤维型膜及其组件势在必行。本文首次报道磺化聚乙烯中空纤维阳离子交换膜对异丙醇/水的渗透汽化性能。

关键词: 渗透汽化, 中空纤维膜, 离子交换膜, 膜分离, 异丙醇/水混合液, 磺化聚乙烯

Abstract: The sulfonated polyethylene hollow fiber ion-exchange membranes with different ionexchange capacity (IEC) were prepared by heterogeneous photochemical chlorosulfonation reaction. The effects of temperature and IEC on the pervaporation of a near azeotropic isopropanol/water feed mixture were studied.

Key words: pervaporation, hollow fiber membrane, ion-exchange membrane, membrane separation, isopropanol/water mixture, sulfonated polyethylene