Selective Skeletal Butene Isomerization through a Bimolecular Mechanism

摘要

n-Butene transformaTion was carried out at 350 deg. Over medium pore size zeolites (H-FER), H-TON, H-EU-1 and H-MFI) and at 500 deg. C over alumina. With fresh catalysts, not only isobutene but also propene and pentenes are primary products, which indicates that at least some of the butene isomerization occurs through oligomerization- isomerization-cracking steps (bimolecular mechanism). The large differences in selectivity are due to many factors, including whether or not trimer intermediates participate in the mechanism and limited product desorption.