应用化学 ›› 2022, Vol. 39 ›› Issue (6): 941-948.DOI: 10.19894/j.issn.1000-0518.210291

• 研究论文 • 上一篇    下一篇

铜掺杂钙铝水滑石催化氧化异丙苯制备异丙苯过氧化氢

周友三1,2, 张毅城1, 吴思宇1, 查飞1(), 陈德军2, 常玥1   

  1. 1.西北师范大学化学化工学院,兰州 730070
    2.兰州助剂厂有限责任公司,兰州 730079
  • 收稿日期:2021-06-16 接受日期:2021-08-31 出版日期:2022-06-01 发布日期:2022-06-27
  • 通讯作者: 查飞

Catalytic Performance of Cu‑Doped Calcium Aluminum Layered Double Hydrotalcites for the Oxidation of Cumene to Cumene Hydrogen Peroxide

You-San ZHOU1,2, Yi-Cheng ZHANG1, Si-Yu WU1, Fei ZHA1(), De-Jun CHEN2, Yue CHANG1   

  1. 1.College of Chemistry & Chemical Engineering,Northwest Normal University,Lanzhou 730070,China
    2.Lanzhou Auxiliary Agent Plant Co. ,Ltd. ,Lanzhou 730079,China
  • Received:2021-06-16 Accepted:2021-08-31 Published:2022-06-01 Online:2022-06-27
  • Contact: Fei ZHA
  • About author:zhafei@nwnu.edu.cn
  • Supported by:
    the National Natural Science Foundation of China(21865031)

摘要:

采用共沉淀法制备了铜掺杂钙铝水滑石Ca4Cu x Al-LDHs(x=0,0.1,0.3,0.5,0.8,1.0),并对其催化异丙苯液相氧化制备异丙苯过氧化氢的活性进行了研究。采用X射线衍射、傅里叶红外光谱、扫描电子显微镜和热分析等手段对Ca4Cu x Al-LDHs进行了表征,制备的Ca4Cu x Al-LDHs保留了水滑石的片层状结构,铜的掺杂使孔径变小,比表面积增大。当进料比(催化剂/异丙苯)为7.5 mg/mL,反应温度85 ℃,氧气流速为15 mL/min,反应时间7 h,异丙苯的转化率为34.5%,异丙苯过氧化氢的选择性为86.9%,催化剂循环使用5次后,异丙苯的转化率为31.2%,异丙苯过氧化氢的选择性为83.3%。研究为异丙苯过氧化氢开发了新的催化体系。

关键词: 水滑石, 铜掺杂, 异丙苯, 异丙苯过氧化氢, 催化氧化

Abstract:

Cu-doped calcium aluminum hydrotalcites of Ca4Cu x Al-LDHs (x=0, 0.1, 0.3, 0.5, 0.8,1.0) were prepared by a coprecipitation method, and its catalytic activity for liquid phase oxidation of cumene to cumene hydroperoxide (CHP) was investigated. Ca4Cu x Al-LDHs were characterized by X-ray diffraction, Fourier transform infrared spectroscopy, scanning electron microscope and thermal analysis. The prepared Ca4Cu x Al-LDHs remain the layered structure of hydrotalcite. The copper doping results in a smaller pore size and a larger specific surface area. When the feed ratio (catalyst/cumene) is 7.5 mg/mL, the reaction temperature is 85 ℃, the flow rate of oxygen is 15 mL/min, and the reaction time is 7 h, Ca4Cu0.5Al-LDHs shows excellent catalytic activity, the conversion of cumene is 34.5% and the selectivity of CHP is 86.9%. After being used for five cycles, the conversion of cumene is 31.2% and the selectivity of CHP is 83.3%. The study is useful for developing the production method for cumene hydrogen peroxide.

Key words: Hydrotalcite, Cu-doping, Cumene, Cumene hydroperoxide, Catalytic peroxidation

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