Cr2O3/γ-Al2O3催化氧化四氢萘合成α-四氢萘酮

doi:10.3724/SP.J.1095.2013.30059

摘要/Abstract

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

中图分类号:

O643.1

许立信, 李培杰, 刘巍巍, 徐艳艳, 王知彩. Cr₂O₃/γ-Al₂O₃催化氧化四氢萘合成α-四氢萘酮[J]. 应用化学, DOI: 10.3724/SP.J.1095.2013.30059.

XU Lixin*, LI Peijie, LIU Weiwei, XU Yanyan, WANG Zhicai. Cr₂O₃/γ-Al₂O₃ Catalyzed Oxidation of Tetralin Toward α-Tetralone[J]. Chinese Journal of Applied Chemistry, DOI: 10.3724/SP.J.1095.2013.30059.

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Cr₂O₃/γ-Al₂O₃催化氧化四氢萘合成α-四氢萘酮

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

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