| 摘要 |
The present invention relates to 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 (10) with at least one pre-bed (11) 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 (10) is subsequently fed to at least one main catalyst bed reactor (30) downstream of the at least one first pre-bed reactor (10) comprising at least one main catalyst bed (31) 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, and - 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 (10) to at least one second pre-bed reactor (20) with at least one pre-bed (21) 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 (20) is subsequently fed to the at least one main catalyst bed reactor (30) downstream of the at least one second pre-bed reactor (10). The present invention relates also to a reactor system for conducting said process. |
