二氧化硅负载的聚硅氮烷-铂配合物在二甲苯加氢反应中的催化行为

Reactive Polymers Pub Date : 1995-02-01 DOI:10.1016/0923-1137(94)00091-I

Chun-Wei Chen, Hong Yu, Mei-Yu Huang, Ying-Yan Jiang

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引用次数: 4

摘要

研究了不同反应参数对硅负载的聚硅氮烷-铂配合物(SiNPt)加氢异构二甲苯催化活性和立体选择性的影响。顺式和反式二甲基环己烷的比例是底物结构、温度和催化剂浓度等因素的函数，顺式二甲基环己烷是三种二甲苯异构体的更有利产物。顺链比下降的顺序如下:邻二甲苯>间二甲苯的在对二甲苯。顺式异构体的比例随着温度的升高或底物/催化剂摩尔比的降低而降低。

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Catalytic behavior of silica-supported polysilazane-platinum complex in the hydrogenation of xylenes

The effects of various reaction parameters on the catalytic activity and stereoselectivity in the hydrogenation of the isomeric xylenes over a silica-supported polysilazane-platinum complex (SiNPt) have been studied. The ratio of cis and trans dimethylcyclohexane is a function of the structure of the substrate, temperature and catalyst concentration etc. cis-Dimethylcyclohexane is the more favored product for each of the three xylene isomers. The $cis trans$ ratio drops in the following order: o-xylene > m-xylene > p-xylene. The proportion of the cis isomer decreases with elevating temperature or decreasing substrate/catalyst mole ratio.

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Reactive Polymers

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