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过程工程学报 ›› 2016, Vol. 16 ›› Issue (3): 522-528.DOI: 10.12034/j.issn.1009-606X.215351

• 材料工程专栏 • 上一篇    下一篇

六方介孔氧化硅负载磷钨酸的催化性能

高良军 陈平   

  1. 浙江海洋学院石化与能源工程学院 辽宁石油化工大学化学与材料科学学院
  • 收稿日期:2015-10-21 修回日期:2015-12-28 出版日期:2016-06-20 发布日期:2017-04-28
  • 通讯作者: 陈平

Catalytic Properties of Hexagonal Mesoporous Silica Supported Phosphoric Acid

GAO Liang-jun CHEN Ping   

  1. School of Petrochemistry and Energy Engineering, Zhejiang Ocean University School of Petrochemistry and Energy Engineering, Zhejiang Ocean University
  • Received:2015-10-21 Revised:2015-12-28 Online:2016-06-20 Published:2017-04-28
  • Contact: CHEN Ping

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摘要： 采用浸渍法将磷钨酸(HPW)负载于六方介孔氧化硅(HMS)上，制备HPW改性HMS介孔材料HPW/HMS，对其进行了表征；以HPW/HMS为催化剂，催化2-萘甲醚(2-MN)与乙酸酐(AA)的酰化反应，考察了各因素对催化反应的影响. 结果表明，HPW高度分散在HMS上，HPW/HMS的酸量和酸强度随HPW负载量增加而增加. 在温度120℃、时间4 h、催化剂用量0.3 g及2-萘甲醚/乙酸酐摩尔比1:2条件下，2-萘甲醚转化率为75.3%(mol)，目标产物2-甲氧基-1-萘乙酮的选择性达83.0%(mol). 催化剂可回收再利用，催化活性略有降低.

关键词: 六方介孔氧化硅, 磷钨酸, 2-萘甲醚, 2-甲氧基-1-萘乙酮, Friedel-Crafts酰基化

Abstract: H3PW12O40×nH2O (HPW) supported on hexagonal mesoporous silica (HMS) was prepared via impregnation method to obtain modified mesoporous HMS (HPW/HMS). The surface structure and acidty of the samples were characterised. The catalytic performance of HPW/HMS was tested through Friedel-Crafts acylations of 2-methoxynaphthalene (2-MN) with acetic anhydride (AA). The results showed that the obtained HPW/HMS catalyst displayed a typical mesoporous structure. HPW was well dispersed on the HMS support, and the acidity increased with the amount of HPW loading. Under the conditions of 120℃, 4 h, HPW/HMS 0.3 g, molar ratio of 2-MN to AA 1:2, the conversion rate of 2-MN was 75.3%(mol) and the selectivity of the main product 2-methoxy-1-acetonaphthone was up to 83.0%(mol). Repeated experiments demonstrated a slight decline in the catalytic activity.

Key words: hexagonal mesoporous silica, hosphotungstic acid, 2-methoxynaphthalene, 2-methoxy-1-acetonaphthone, Friedel-Crafts acylation

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