高等学校化学学报 ›› 2022, Vol. 43 ›› Issue (6): 20220086.doi: 10.7503/cjcu20220086

• 研究论文: 无机化学 • 上一篇    下一篇

有机杂化介孔Beta分子筛的合成及在苯甲醇烷基化反应中的应用

陈玮琴1, 吕佳敏1, 余申1, 刘湛1, 李小云2(), 陈丽华1(), 苏宝连1,3   

  1. 1.武汉理工大学材料复合新技术国家重点实验室
    2.硅酸盐建筑材料国家重点实验室, 武汉 430070
    3.那慕尔大学无机材料化学实验室, 那慕尔 B?5000
  • 收稿日期:2022-02-12 出版日期:2022-06-10 发布日期:2022-03-01
  • 通讯作者: 李小云 E-mail:xiaoyunli2015@whut.edu.cn;chenlihua@whut.edu.cn
  • 作者简介:陈丽华, 男, 博士, 研究员, 主要从事能源环境催化材料研究. E-mail: chenlihua@whut.edu.cn
  • 基金资助:
    国家自然科学基金(U20A20122)

Preparation of Organic Hybrid Mesoporous Beta Zeolite for Alkylation of Mesitylene with Benzyl Alcohol

CHEN Weiqin1, LYU Jiamin1, YU Shen1, LIU Zhan1, LI Xiaoyun2(), CHEN Lihua1(), SU Baolian1,3   

  1. 1.State Key Laboratory of Advanced Technology for Materials Synthesis and Processing
    2.State Key Laboratory of Silicate Material for Architecture,Wuhan University of Technology,Wuhan 430070,China
    3.Laboratory of Inorganic Materials Chemistry,University of Namur,Namur B? 5000,Belgium
  • Received:2022-02-12 Online:2022-06-10 Published:2022-03-01
  • Contact: LI Xiaoyun E-mail:xiaoyunli2015@whut.edu.cn;chenlihua@whut.edu.cn
  • Supported by:
    the National Natural Science Foundation of China(U20A20122)

摘要:

针对沸石分子筛在苯甲醇和三甲基苯的烷基化催化反应应用中存在催化活性低及微孔孔道内大量苯甲醇自醚化副反应导致产物选择性低这一难题, 通过引入等级孔结构提高外比表面积和有机杂化修饰封堵微孔孔道的双重策略, 在大幅提升可接触的外表面活性中心数量的同时有效降低苯甲醇进入微孔孔道内发生自醚化副反应, 开发出具有高反应活性及烷基化产物选择性的有机杂化介孔Beta分子筛材料, 大幅度提升了其对苯甲醇和三甲基苯的烷基化反应的催化活性和产物的选择性, 使苯甲醇的转化率从66.8%提升到了99.7%, 烷基化产物的选择性从14.8%提高到50.7%. 本工作为开发高活性及高选择性的烷基化催化剂提供了新的思路.

关键词: Beta分子筛, 等级结构, 有机杂化, 烷基化

Abstract:

Through the dual strategy by introducing a hierarchical pore structure and an organic hybrid modification in zeolites, an existing problem of low catalytic selectivity, caused by quantities of side reaction of benzyl alcohol self-etherification in micropores, and the low catalytic activity in the alkylation reaction of benzyl alcohol and mesitylene has been solved. We developed an organic hybrid mesoporous Beta zeolite with high activity and high selectivity to alkylation products, which has greatly increased the number of accessible active centers on external specific surface, effectively reduced the self-etherification side reaction of benzyl alcohol in micropores, and immensely improved its alkylation catalytic activity and selectivity to alkylation product in the reaction of benzyl alcohol and trimethylbenzene. Eventually, we realized the increasing conversion of benzyl alcohol from 66.8% to 99.7% and the increasing selectivity to 2-benzyl-1,3,5-triethyl benzene from 14.8% to 50.7%. This work will provide a new thinking of the development of catalysts with high activity and selectivity in Friedel-Crafts alkylation.

Key words: Beta zeolite, Hierarchical structure, Organic hybridization, Alkylation

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