镁铝水滑石固载重铬酸钾液相活化氧气氧化醇  

Liquid-Phase Oxidation of Alcohols with Mg-Al Hydrotalcite-Supported Cr_2O_7^(2-) in the Presence of Molecular Oxygen

作　　者：王洪艳[1] 陈敏东[1] 刘宝生[2] 谢颖[2] 纪红兵[3] 

机构地区：[1]南京信息工程大学环境科学与工程学院,江苏南京210044 [2]茂名学院化工研究所,广东茂名525000 [3]华南理工大学化工与能源学院,广东广州510640

出　　处：《茂名学院学报》2007年第6期6-9,共4页Journal of Maoming College

基　　金：国家自然科学基金(30472066);江苏省高校自然科学基金(04KJB50056)

摘　　要：采用共沉淀法制得镁铝水滑石固载K2Cr2O7催化剂HT-Cr2O72-,将该催化剂在温和条件下,以分子氧为氧化剂用于催化醇的液相氧化反应,并以2-吡啶甲醇的氧化反应为模型探讨了温度、溶剂、催化剂量等条件对反应的影响。结果表明,使用苯、三氟甲苯等溶剂更有利于反应进行,2-吡啶甲醇转化率随着温度上升明显提高,该催化剂可以在温和条件下实现醇类化合物的高选择性氧化转化;和其他固体催化剂用于液相醇氧化相比,该催化剂具有更高的活性转化数(TON)。Mg - Al hydrotalcite - supported Cr2O7^2- catalysts （abbreviated as HT- Cr2O7^2- is prepared by coprecipitation method and sub- jected to liquid- phase oxidation of alcohols in the presence of molecular oxygen under mild conditions. Oxidation of 2 - pyridinemethanol as the model reaction is investigated, and the influence of reaction conditions including reaction temperature, solvent and materials ratio on the oxidative performance has also been studied. Several solvents such as benzene, benzotrifluoride and elevated reaction temperature favored the reaction. Compared with other solid catalytic systems of alcohols oxidation, this catalyst can gain higher turnover number （TON）.

关 键 词：镁铝水滑石 重铬酸根阴离子 固体催化剂 醇氧化 

分 类 号：TQ032.41[化学工程]