中华医学超声杂志

应用化学 ›› 1994, Vol. 0 ›› Issue (2): 81-84.

• 研究论文 • 上一篇    下一篇

碱金属离子改性聚乙烯醇渗透汽化膜

张贵宝, 付圣权, 张可达   

  1. 中国科学院长春应用化学研究所 长春 130022
  • 收稿日期:1993-07-20 修回日期:1993-11-24 出版日期:1994-04-10 发布日期:1994-04-10
  • 基金资助:
    国家自然科学基金资助项目

Alkali-Metal Ion Improved PVA Pervaporation Membrane

Zhang Guibao, Fu Shengquan, Zhang Keda   

  1. Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022
  • Received:1993-07-20 Revised:1993-11-24 Published:1994-04-10 Online:1994-04-10

PDF

393

被引次数

15 | 2

摘要： 研究了含碱金属氯化物的聚乙烯醇。马来酸酐(PVA-MA)交联膜对乙醇-水混合物的分高性能,盐含量低于6%质量时,膜的透量明显增加,原料液乙醇浓度较高时,分离系数也增大,含盐膜从50%乙醇水溶液中吸附了5%～8%的自由水。

关键词: 渗透汽化, 膜, 聚乙烯醇, 乙醇分离

Abstract: The separation of ethanol/water mixture by pervaporation by crosslinked PVA-MA membrane containing LiCl,NaCl and KCl has been investigated.The flux increased markedly when salt content was less than 6 wt% in the dry membrane,and the separation factor increased when ethanol concentration in feed solution was high.The DSC results showed that the membranes adsorbed 5%～8wt% of free water from ethanol/water mixture (50/50wt/wt),which is hardly observed by weighing method.

Key words: pervaporation, membrane, poly(vinyl alcohol), ethanol separation

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