Multi-stage catalyst system for self-metathesis with controlled isomerization and decomposition

摘要

Introducing a 2-butene-containing hydrocarbon stream into the isomerization catalyst zone to isomerize 2-butene to 1-butene; and converting 2-butene and 1-butene with propylene and a C ₄ -C ₆ olefin. Transporting 2-butene and 1-butene to a metathesis catalyst zone to cross-metathesis the metathesis product stream comprising: and cracking the metathesis product stream in a catalytic cracking zone to produce propylene. Embodiments of the process for producing and the multi-stage catalyst system. The isomerization catalyst zone contains a silica-alumina catalyst having a weight ratio of alumina to silica of 1:99 to 20:80. The metathesis catalyst includes a mesoporous silica catalyst support impregnated with a metal oxide. The catalytic cracking zone contains a mordenite backbone (MFI) structured silica catalyst.