应用化学

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Cr2O3/γ-Al2O3催化氧化四氢萘合成α-四氢萘酮

许立信*,李培杰,刘巍巍,徐艳艳,王知彩   

  1. (安徽工业大学化学与化工学院 马鞍山 243002)
  • 收稿日期:2013-01-24 修回日期:2013-03-26 出版日期:2013-11-10 发布日期:2013-11-10
  • 通讯作者: 许立信,副教授; Tel:0555-2311807; E-mail:Lxxu@abut.edu.cn; 研究方向:工业催化和化工过程开发
  • 基金资助:
    国家自然科学基金(20907001)安徽省教育厅重点项目(KJ2009A010Z)安徽工业大学创新团队和研究生导师创新基金项目(D201107)

Cr2O3/γ-Al2O3 Catalyzed Oxidation of Tetralin Toward α-Tetralone

XU Lixin*, LI Peijie, LIU Weiwei, XU Yanyan, WANG Zhicai   

  1. (School of Chemistry and Chemical Engineering,Anhui University of Technology,Ma′anshan 243002,China)
  • Received:2013-01-24 Revised:2013-03-26 Published:2013-11-10 Online:2013-11-10

摘要: 采用等体积浸渍法,制备了Cr2O3/γ-Al2O3催化剂,通过XRD、固体紫外可见光漫反射和TG-DTA对产物进行了表征,考察了Cr负载量、焙烧温度、反应温度以及催化剂用量等因素对四氢萘催化氧化合成α-四氢萘酮催化性能的影响。 结果表明,Cr在催化剂表面上主要以Cr2O3形式存在,尚含有少量的CrO3,且充分分散。 在120 ℃氧化反应8 h,7.5%Cr2O3/γ-Al2O3催化剂上得到了转化率为50.1%的四氢萘和选择性为79.7%的α-四氢萘酮,该催化剂的稳定性良好。

关键词: 四氢萘, &, alpha, -四氢萘酮, 氧化, 铬催化剂, 氧化铝

Abstract: Cr2O3/γ-Al2O3 catalysts were prepared through the wetness impregnation method and characterized by XRD, UV-Vis DRS and TG-DTA. The effects of Cr loadings, catalyst calcination temperature, oxidation reaction temperature and the catalyst quantity on the catalytic oxidation of tetralin to α-tetralone were investigated. The results demonstrate that the dominant active specie of the catalysts is Cr2O3 with a small amount of CrO3 highly dispersed on the surface of γ-Al2O3. A conversion of 50.1% of tetralin and a selectivity of 79.7% of α-tetralone are obtained over the 7.5%Cr2O3/γ-Al2O3 catalyst at 120 ℃ after 8 h oxidation. The as-obtained catalysts exhibit a good stability.

Key words: tetralin, &, alpha, -tetralone, oxidation, chromium catalyst, alumina

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