生物质基呋喃制备对二甲苯研究进展

对二甲苯是重要的大宗化工原料,生产主要依赖石油资源。作为从生物质资源出发制取生物质基聚酯新途径的关键一步,2,5-二甲基呋喃催化转化制备对二甲苯备受关注。综述了2,5-二甲基呋喃与乙烯发生环加成反应制备对二甲苯的研究进展,对多种催化剂的催化性能进行比较,其中分子筛表现出优异的催化反应活性。详述了反应网络和反应机理,发展新型双功能催化剂能够同时实现高的Diels-Alder环加成反应速率和脱水反应速率,从而获得更高的催化反应活性,改进催化剂性能和优化反应条件以避免副反应的发生,从而进一步提高对二甲苯选择性。并对未来研究和工业应用前景进行展望。

Research progress in the preparation of p-xylene from biomass-based furan

p-Xylene is an important bulk chemical raw material,and its production mainly relys on oil resources.As the key step in the new preparation route of biomass-based polyesters from biomass resources,the catalytic conversion of 2,5-dimethylfuran to p-xylene has attracted much attention.In this paper,the research advance in p-xylene preparation through cycloaddition reaction of 2,5-dimethylfuran with ethylene was reviewed.The catalytic performance of various catalysts was compared, and the zeolites exhibited excellent catalytic reactivity.The reaction network and reaction mechanism were also described in detail.The development of new bifunctional catalysts could simultaneously achieve high Diels-Alder cycloaddition rate and dehydration reaction rate to obtain higher catalytic activity, while improving catalyst performance and optimizing the reaction conditions could avoid the occurrence of side reactions,and further increase the selectivity to p-xylene.Finally,the future research and commercial application prospects were outlined.