甲苯与甲醇侧链烷基化制苯乙烯的研究进展

PROGRESS IN SIDE-CHAIN ALKYLATION OF TOLUENE WITH METHNOL TO STYRENE

甲苯与甲醇侧链烷基化制苯乙烯工艺过程简单、原料廉价,是有发展前景的苯乙烯工业生产路线。介绍了甲苯与甲醇发生侧链烷基化的反应机理和反应热力学,剖析了催化剂性质对该反应过程的影响,进而综述了近年来用于该反应的分子筛类和非分子筛类催化剂的研究进展。分析表明,目前对于甲苯侧链烷基化催化剂的研究主要集中在两个方面:一方面是对X分子筛催化剂的改性,通过调变X分子筛表面酸碱性质来控制反应过程;另一方面是开发具有匹配酸碱性质及合适孔道结构的新型高效催化剂。

The process of toluene-methanol side-chain alkylation to styrene is simple,and the raw materials are widely available and cheap.It is a significant way for industrial production of styrene.The mechanism and thermodynamics of side chain alkylation of toluene with methanol were introduced,the influence of catalyst properties on the reaction process was analyzed,and the research progress of zeolite and non-zeolite catalysts for the reaction in recent years was reviewed.The analysis shows that the research of side-chain alkylation catalyst for toluene mainly focuses on two aspects:one is the modification of X zeolite catalyst which controls the reaction process of reactants by adjusting the surface acid and base properties of X zeolite;the other is that,developing new efficient side-chain alkylation catalyst with matching acid-base properties and suitable pore structure is also the main research direction.