Alkylation of Alkyl Aromatic Hydrocarbons over Metal Oxide–Alkali Metal Superbasic Catalysts
作者:J Kijeński、P Radomski、E Fedoryńska
DOI:10.1006/jcat.2001.3327
日期:2001.10
The alkylation of toluene, ethylbenzene, cumene, and xylenes with ethene, propene, and 1,2-diphenylethylene was investigated over superbasic MgO–K and γ-Al2O3–K catalysts and over model systems of the EDA complex type. Metal oxide–alkali metal solid superbases as well as MgO–K polyaromatic hydrocarbon systems exhibited high activity in the transformations carried out under atmospheric and elevated
甲苯,乙苯,枯烯,并用乙烯,丙烯,和1,2-二苯基乙烯二甲苯的烷基化进行了研究过的MgO superbasic-K和γ-Al系2种ö 3 -K催化剂和在EDA复杂类型的模型系统。金属氧化物-碱金属固体超碱以及MgO-K聚芳烃体系在大气压和低温下在高压下进行的转化表现出很高的活性。反应动力学,吸附中间体的ESR研究结果以及使用自由基捕集剂TEMPO的中毒效应使得能够将F s +位点鉴定为催化活性中心。证实并举例说明了反应的自由基途径的提议。