高等学校化学学报

高等学校化学学报 ›› 2004, Vol. 25 ›› Issue (6): 1137.

• 研究快报 • 上一篇    下一篇

离子液体对甲基丙烯醛氧化酯化反应的影响

李桂花1,2, 张锁江1, 李增喜1,3, 李铭岫2, 张香平1   

  1. 1. 中国科学院过程工程研究所, 北京 100080;
    2. 河北师范大学化学学院, 石家庄 050091;
    3. 中国科学院研究生院, 北京 100039
  • 收稿日期:2003-12-10 出版日期:2004-06-24 发布日期:2004-06-24
  • 通讯作者: 张锁江(1964年出生),男,博士,研究员,博士生导师,从事绿色化学工程研究.E-mail:sjzhang@home.ipe.ac.cn E-mail:sjzhang@home.ipe.ac.cn
  • 基金资助:

    国家自然科学基金(批准号:20276073);重质油加工国家重点实验室开放基金(批准号:2003-05)资助

Effect of Ionic Liquid on the Oxidative Esterification From Methacrolein to Methyl Methacrylate

LI Gui-Hua1,2, ZHANG Suo-Jiang1, LI Zeng-Xi1,3, LI Ming-Xiu2, ZHANG Xiang-Ping1   

  1. 1. Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100080, China;
    2. College of Chemistry, Hebei Normal University, Shijiazhuang 050091, China;
    3. Graduate School of the Chinese Academy of Sciences, Beijing 100039, China
  • Received:2003-12-10 Online:2004-06-24 Published:2004-06-24

PDF (PC)

被引次数

43

摘要： 异丁烯氧化制备甲基丙烯酸甲酯(MMA)是一条极具优势、清洁高效的工艺技术路线.但甲基丙烯酸甲酯极易聚合[1],故异丁烯三步法及传统的丙酮氰醇法均在酯化过程中加入对苯二酚、对羟基苯甲醚、2,4-甲基-6-叔丁基苯酚等有机物作为阻聚剂[2].而甲基丙烯醛直接氧化酯化为MMA时,碱性和加热的反应条件使MMA更易聚合[3].因而防止MMA在反应过程中的聚合成为工艺技术的关键问题.本文在甲基丙烯醛一步氧化酯化生成MMA的反应体系中添加离子液体1-丁基-3-甲基咪唑六氟磷酸盐([bm im]PF6),结果表明,该离子液体既能提高MMA的选择性还有效防止MMA的聚合.

关键词: 离子液体, 甲基丙烯酸甲酯, 甲基丙烯醛, 氧化酯化, 阻聚剂

Abstract: Ionic liquid（IL）,[bmim]PF6,was used in the reaction of one-step oxidative esterification from methacrolein to methyl methacrylate. It was found that ionic liquid not only increased the selectivity of methyl methacrylate but also inhibited its polymerization. The selectivity of methyl methacrylate was increased from 45% to 100% with ionic liquid. The experiment results showed that the content of ionic liquid had no effects on the selectivity of methyl methacrylate in a certain range of IL concentration,which indicated that ionic liquid could be used as a potential inhibitor of polymerization.

Key words: Ionic liquid, Methyl methacrylate, Methacrolein, Oxidative esterification, Polymerization inhibitor

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