Abstract

The study of isoamylene oligomerization over a number of microporous zeolites such as H–Y, H–MOR, H–Beta, H–ZSM-12, and H–ZSM-5 revealed that the isoamylene conversion rate decreases in the following order: H–MOR > H–Y > H–Beta-40 >> H–ZSM-12 > H–ZSM-5. The maximum yields of isoamylene oligomers were achieved by using H–MOR (85.0%), H–Y (80.1%), and H–Beta-40 (79.8%). The predominant isoamylene oligomers are dimers regardless of the zeolite catalyst used. The trimer yield reaches its highest when wide-pore zeolites like H–MOR, H–Y, or H–Beta-40 are employed. An increase in the number of acid sites enhances monomer conversion rate, oligomer yield, and oligomer molecular weight. Conditions for producing isopentene dimers and trimers with the maximum possible yield were determined.

中文翻译：

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沸石催化剂上异戊烯低聚

摘要

对H–Y，H–MOR，H–Beta，H–ZSM-12和H–ZSM-5等许多微孔沸石进行异戊烯低聚的研究表明，异戊烯的转化率按以下顺序降低：H –MOR> H–Y> H–Beta-40 >> H–ZSM-12> H–ZSM-5。使用H–MOR（85.0％），H–Y（80.1％）和H–Beta-40（79.8％）可获得异戊烯低聚物的最大收率。无论使用何种沸石催化剂，主要的异戊烯低聚物都是二聚体。当使用H–MOR，H–Y或H–Beta-40等宽孔沸石时，三聚体收率达到最高。酸位点数目的增加提高了单体转化率，低聚物产率和低聚物分子量。确定了以最大可能的产率生产异戊烯二聚体和三聚体的条件。