正丁烯双键位置异构催化剂研究进展

介绍了正丁烯双键位置异构反应的热力学和动力学特征、不同异构反应催化剂的研究现状、异构反应机理。评述了金属氧化物、金属碳化物和氮化物、金属硫酸盐和磷酸盐、金属、分子筛、阳离子交换树脂以及离子液体等催化剂的异构活性、选择性和活性中心的特点以及各种催化剂的优缺点。认为在不同种类催化剂上,异构反应的机理和1-丁烯的选择性不尽相同,在实际催化反应中应根据原料的组成和操作条件等选择适宜的异构催化剂。

Recent advances in n-butene double-bond positional isomerization catalysts

Increasing attention has been paid recently to the double-bond positional isomerization of n-butene because of the availability of large C4 resources and the demand of 1-butene.The thermodynamics and kinetics of the double-bond positional isomerization of n-butene are described and the advances in isomerization catalysts are reviewed.The reaction mechanism of the double-bond positional isomerization is analyzed.The activity,selectivity and active sites of metal oxides,metal carbides and nitrides,metal sulfates and phosphates,metals,molecular sieve,ion-exchanged resins and ionic liquids are compared.The advantages and shortcomings of the above catalysts are evaluated.Different catalysts have different mechanisms of isomerization and are appropriate for different feed compositions and operation conditions.