Process for Olefin Production by Metathesis and Reactor System Therefor

摘要

A process for obtaining an olefin by metathesis including at least two reaction pathways. In at least one first reaction pathway at least one stream with at least one olefin as starting material is fed to at least one first pre-bed reactor with at least one pre-bed having at least one compound selected from the group of alkaline earth metal oxides. The stream leaving the at least one first pre-bed reactor is subsequently fed to at least one main catalyst bed reactor downstream of the at least one first pre-bed reactor including at least one main catalyst bed with at least one first catalyst component comprising a metathesis catalyst, and at least one second catalyst component comprising a catalyst for double bond isomerisation, whereby the first and second catalyst are physically mixed with each other.

主权项

1. A process for obtaining an olefin by metathesis comprising at least two reaction pathways, wherein
in at least one first reaction pathway at least one stream comprising at least one olefin as starting material is fed to at least one first pre-bed reactor with at least one pre-bed comprising at least one compound selected from the group of alkaline earth metal oxides, and the stream leaving the at least one first pre-bed reactor is subsequently fed to at least one main catalyst bed reactor downstream of the at least one first pre-bed reactor comprising at least one main catalyst bed comprising at least one first catalyst component comprising a metathesis catalyst, and at least one second catalyst component comprising a catalyst for double bond isomerisation, whereby the first and second catalyst are physically mixed with each other, wherein in at least one second reaction pathway the at least one stream comprising at least one olefin as starting material is re-directed from the at least one first pre-bed reactor to at least one second pre-bed reactor with at least one pre-bed comprising at least one compound selected from the group of alkaline earth metal oxides, and the stream leaving the at least one second pre-bed reactor is subsequently fed to the at least one main catalyst bed reactor downstream of the at least one second pre-bed reactor, wherein an operational temperature of the first pre-bed reactor and an operational temperature of the second pre-bed reactor are lower than an operational temperature of the main catalyst bed reactor.