【摘要】 制备了钒络合物催化剂及其分子筛负载型催化剂,并对1-辛烯、环己烷、甲苯、正己烷和正庚烷的均相及非均相催化氧化反应进行了研究。实验结果表明,非均相催化剂不但具备与均相催化剂相似的催化氧化性能,还对伯醇和对位产物有较好的择形选择性。本研究还考察了乙腈、二氯甲烷等溶剂对烃类均相及非均相催化氧化反应的溶剂效应,提出并验证了钒络合物催化剂作用下烃类催化氧化反应的自由基反应机理。更多还原

【Abstract】 Zeoliteencapsulated vanadium(Ⅳ) picolinic complexes catalyst and corresponding homogeneous catalyst VO(pic)2·H2O are prepared. The catalysts are used in the oxidation of 1octene, cyclohexane, toluene, nhexane and nheptane. The results suggest that the "shipinabottle" catalyst retains the same catalytic activity as homogeneous catalyst VO(pic)2·H2O and exhibits good shape selectivity as compared to the unencapsulated complexes. The effect of solvents, including acetonitrile, dichloromethane and hexane, on alkanes catalytic oxidation are investigated. A free radical mechanism of hydrocarbons catalytic oxidation is suggested and proved by adding a free radical trap.更多还原