Preparation of propene and, if desired, 1-butene

Details Preparation of propene and, if desired, 1-butene Preparation of propene and, if desired, 1-butene

2005-05-03

2005-05-03

Bhat, N. (Department: 1764)

Chemical apparatus and process disinfecting, deodorizing, preser

Chemical reactor

Organic polymerization

C422S135000, C422S186220, C422S198000, C422S236000

Reexamination Certificate

active

06887434

ABSTRACT:
Propene and, if desired, 1-butene are prepared bya) reacting 1-butene and 2-butene to give propene and 2-pentene in the presence of a metathesis catalyst comprising at least one compound of a metal of transition group VIb, VIIb or VIII of the Periodic Table of the Elements,b) subsequently separating the propene and 2-pentene formed,c) subsequently reacting the 2-pentene with ethene to give propene and 1-butene in the presence of a metathesis catalyst comprising at least one compound of a metal of transition group VIb, VIIb or VIII of the Periodic Table of the Elements,d) subsequently separating the propene and 1-butene formed,e) discharging at least some of the 1-butene formed and/or at least partly isomerizing the 1-butene formed to give 2-butene in the presence of an isomerization catalyst and subsequently returning the undischarged 1-butene and the 2-butene formed together with a part of the C4fraction not reacted in step a) to step a).

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