Chin. J. Process Eng. ›› 2016, Vol. 16 ›› Issue (3): 522-528.DOI: 10.12034/j.issn.1009-606X.215351
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GAO Liang-jun CHEN Ping
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高良军 陈平
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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
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
CLC Number:
TQ032.4
GAO Liang-jun CHEN Ping. Catalytic Properties of Hexagonal Mesoporous Silica Supported Phosphoric Acid[J]. Chin. J. Process Eng., 2016, 16(3): 522-528.
高良军 陈平. 六方介孔氧化硅负载磷钨酸的催化性能[J]. 过程工程学报, 2016, 16(3): 522-528.
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URL: https://www.jproeng.com/EN/10.12034/j.issn.1009-606X.215351
https://www.jproeng.com/EN/Y2016/V16/I3/522