甲苯-甲醇侧链烷基化制备苯乙烯反应机理与催化剂

Side-chain alkylation of toluene with methanol to produce styrene: mechanism and catalysts

甲苯-甲醇侧链烷基化制备苯乙烯是具有重要研究意义和工业化前景的苯乙烯生产途径。本文回顾了甲苯-甲醇侧链烷基化的研究背景,综述了近年来甲苯-甲醇侧链烷基化反应机理的研究进展,简述了反应条件的影响,分析了催化剂特点和需求,全面总结了酸碱双功能催化剂开发理念和技术路线。对甲苯-甲醇侧链烷基化反应历程的研究结果和热力学特性进行了分析,结果表明甲醇深度分解和活化甲苯侧链甲基为反应主要限制因素。最后论述了新催化材料在侧链烷基化反应中的应用,提出酸催化剂和碱催化剂的高效耦合构建活性中心的催化剂设计新思路。

Side-chain alkylation of toluene with methanol is a promising method to prepare styrenewhich shows great industrial prospect and therefore is of both economic and scientific importance.The research background is briefly introduced and then the research progress on the side-chainalkylation mechanism is systemically reviewed.Subsequently,we summarize the influence of variousreaction conditions and the features of different catalysts.The development concepts and technologyroutes of acid-base dual-functional catalysts are summarized comprehensively.Results based onreaction mechanistic path and thermodynamic property analysis show that methanol decomposition andactivation of methyl in toluene are the main limiting factors.Ultimately,this review providesapplications of new catalytic materials in side-chain alkylation and a novel catalyst design idea thatcombines suitable acid and basic catalyst to construct synergistic catalysts.