高等学校化学学报 ›› 2003, Vol. 24 ›› Issue (6): 1106.

• 论文 • 上一篇    下一篇

醚化β-环糊精的制备及其混合膜对二甲苯异构体的选择性

钱锦文1, 王丽娜1, 安全福1, 陈欢林2   

  1. 1. 浙江大学高分子科学与工程系;
    2. 化学工程系, 杭州 310027
  • 收稿日期:2002-04-24 出版日期:2003-06-24 发布日期:2003-06-24
  • 通讯作者: 钱锦文(1946年出生),男,教授,博士生导师,主要从事高分子结构与性能研究.E-mail:qianjw@ipsm.zju.edu.cn E-mail:qianjw@ipsm.zju.edu.cn
  • 基金资助:

    国家自科学基金(批准号:29836160)资助

Preparation of Etherified β-Cyclodextrin and SelectivitYIN Its Blend Membrane for Xylene Isomers

QIAN Jin-Wen1, WANG Li-Na1, AN Quan-Fu1, CHEN Huan-Lin2   

  1. 1. Department of Polymer Science and Engineering;
    2. Department of Chemical Engineering, Zhejiang University, Hangzhou 310027, China
  • Received:2002-04-24 Online:2003-06-24 Published:2003-06-24

摘要: 采用WilliamSon合成法使氯化苄(PhCH2Cl)与β-环糊精(β-CD)进行醚化反应.红外光谱表明,所得产物为醚化β-CD.根据元素分析结果,计算出各反应的取代度和转化率.系统地考察了反应条件对转化率和取代度的影响.此外,考察了醚化β-CD与聚乙烯醇缩丁醛(PVB)共混膜对含10%对二甲苯的对/间二甲苯混合液的渗透气化性能的影响.结果显示,30℃时,共混膜的分离因子α可达1.16,而对二甲苯PX的渗透通量J高达70.57g/(m2·h).

关键词: &beta, -环糊精, 醚化反应, 氯化苄, 二甲苯, 渗透气化膜

Abstract: Etherified β-CD was synthesized bYUsing benzyl chloride(PhCH22Cl).The influences of etherification conditions on the reaction conversion and the degree of substitution of etherified β-CD were investigated. The reaction conversion increases with increasing molar ratio of PhCH22Cl to β-CD and the concentration of β-CD. The most proper temperature and time for the reaction conversion are 90 ℃ and 12 h, respectively. The degree of substitution of etherified β-CD increases greatly with increasing molar ratio of PhCH22Cl to β-CD, but there is no significant change for the degree of substitution when temperature, time and concentration of β-CD increased. Meanwhile, the pervaporation performance of PVB membrane containing 25%(mass fraction) etherified β-CD for 10%(mass fraction) PX in PM/MX mixture were measured, and the separation factor α=1.16, permeation flux J=70.57 g/(m2·h) at 30 ℃ were obtained.

Key words: Cyclodextrin, Etherification, Benzyl chloride, Xylene, Pervaporation membrane

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