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镁铝水滑石负载MnO-4催化氧化乙苯合成苯乙酮

汪一帆,周维友,方筱,陈群*   

  1. (常州大学石油化工中心省级重点实验室 常州 213164)
  • 收稿日期:2011-09-30 修回日期:2012-02-05 出版日期:2012-09-10 发布日期:2012-09-10
  • 通讯作者: 陈群，研究员; Tel/Fax:0519-86330251; E-mail:13906123032@126.com; 研究方向：清洁化生产工艺

Catalytic Oxidation of Ethylbenzene to Acetophenone Using Mg-Al Hydrotalcite-Supported MnO-4 Catalyst

WANG Yifan, ZHOU Weiyou, FANG Xiao, CHEN Qun*   

  1. (Jiangsu Province Key Laboratory of Fine Petrochemical Engineering,Changzhou University,Changzhou 213164,China)
  • Received:2011-09-30 Revised:2012-02-05 Published:2012-09-10 Online:2012-09-10

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摘要： 采用焙烧还原法制备了镁铝水滑石负载MnO-4催化剂，并将其应用于催化氧气氧化乙苯合成苯乙酮的反应中。 考察了催化剂用量、反应温度、反应时间、MnO-4负载量和镁铝比等因素对催化氧化反应的影响及催化剂的重复使用性能。 在优化条件下：催化剂用量3 g，乙苯用量45 mL，反应温度120 ℃，水滑石结构中n(Mg)/n(Al)=5，氧气流量100 mL/min，苯乙酮产率可达57.0%，苯乙酮选择性可达96.3%，催化剂重复使用3次催化活性降低较小。

关键词: 水滑石, 乙苯, 绿色氧化, 苯乙酮

Abstract: The liquid-phase selective oxidation of ethylbenzene to acetophenone by oxygen using MnO-4 exchanged Mg-Al-hydrotalcite as catalyst has been investigated in the absence of solvent. The effects of catalyst dosage, reaction temperature and reaction time on the yield of acetophenone and the conversion of ethylbenzene have been studied. Under the following optimized conditions:catalyst 3 g, ethylbenzene 45 mL, reaction temperature 120 ℃, the oxygen flow velocity 100 mL/min, the yield and selectivity of acetophenone can be up to 57.0% and 96.3%, respectively. The catalyst retained high catalytic activity after three recylclings.

Key words: hydrotalcite, ethylbenzene, green oxidation, acetophenone

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