异丁烷/丁烯烷基化分子筛催化剂的失活研究进展

摘要

分子筛催化剂在催化异丁烷/丁烯烷基化中具有良好的应用前景,但易失活,需频繁再生.系统总结分子筛催化剂在异丁烷/丁烯烷基化反应中的研究进展,认为烯烃低聚物覆盖活性位、堵塞分子筛孔道是催化剂失活的直接原因.论述了分子筛性能及烷基化反应条件对分子筛失活的影响,指出具有合适B酸强度和数量、易于丁烯低聚物脱附、利于扩散的分子筛催化剂是未来的研究方向.%Zeolite catalysts have promising application prospects forisobutane/butene alkylation,but deac-tivate fast and have to frequently regenerate.Researches about zeolite catalysts forisobutane/butene alkyla-tion have been summarized systematically.Butene oligomers covering active sites or plugging poresis con-sidered to be the direct reason for catalysts deactivation.The influence of zeolite properties and alkylation reaction conditions on catalysts deactivation is discussed.It is pointed out that zeolite catalysts which pro-vide appropriate strength and quantity of Br?nsted acid,tend to oligomer desorptionand diffusion are the research trends in the future.