中华医学超声杂志

应用化学 ›› 1993, Vol. 0 ›› Issue (2): 112-114.

• 研究简报 • 上一篇    下一篇

用渗透汽化改性聚乙烯醇膜促进酯化反应

刘福田, 俞贤达, 曹淑琴   

  1. 中国科学院兰州化学物理研究所 730000 兰州
  • 收稿日期:1992-04-09 修回日期:1992-09-27 出版日期:1993-04-10 发布日期:1993-04-10
  • 基金资助:
    国家自然科学基金资助课题

FACILITATION EFFECT OF MODIFIED PVA MEMBRANES ON ESTERIFICATION BY PERVAPORATION

Liu Futian, Yu Xianda, Cao Suqin   

  1. Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, 730000 Lanzhou
  • Received:1992-04-09 Revised:1992-09-27 Published:1993-04-10 Online:1993-04-10

PDF

373

被引次数

12 | 1

摘要： 目前多用陶瓷膜、金属膜来研究膜反应过程,用有机高分子材料的报道较少。浦上忠用磺化苯乙烯系列膜材料研究了酯化反应,产生的水分靠浓差进行扩散排除。聚乙烯醇(PVA)有较强的亲水性,但溶于热水。本文用不溶于水的改陸PVA作渗透膜,将水分从反应场中清除,研究其对酯化反应的促进作用。同时将苯乙烯-醋酸乙烯酯嵌段共聚物磺化,再水解成磺化苯乙烯-乙烯醇嵌段共聚物。将这种共聚物作为酸催化剂,附着在PVA膜上,考察此复合膜对正丁醇-乙酸酯化反应的促进作用。

关键词: 磺化苯乙烯-乙烯醇嵌段共聚物, 渗透汽化膜, 正丁醇, 乙酸, 酯化反应

Abstract: The sulfonated styrene-vinyl alcohol block copolymers were synthesized. The effects of the moditfied PVA membranes on the esterification of n-butanol and acetic acid were investigated. The PVA membranes were prepared from PVA, cross-linked with, decanal and Cr(Ⅲ), and heat treated PVA. The composite membrane was prepared by supporting the sulfonated styrene-vinyl alcohol copolymer on the heat-treated PVA membrane and assembled into a single reactor. The modified PVA membranes had the ability to facilitate the esterification reaction and the reactor with assembled membrane showed both the catalytic activity and facility for esterifieation.

Key words: pervaporation membrane, butanol, acetic acid, esterification, sulfonated styrene-vinyl alcohol copolymer

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