Patent ID: 9611193
Date: 2017-04-04
CPC Classifications: B01J,C07C,Y02P

Claim:
1. A system for the production of C 4 olefins, the system comprising: an isomerization reaction zone for contacting a hydrocarbon mixture comprising alpha-pentenes with an isomerization catalyst to form an isomerization product comprising beta-pentenes; a first metathesis reaction zone for contacting ethylene and the beta-pentenes with a first metathesis catalyst to form a first metathesis product comprising butenes and propylene, as well as any unreacted ethylene and C a separation system for fractionating the first metathesis product to form an ethylene fraction, a propylene fraction, a butene fraction, and a C a second metathesis reaction zone for contacting the propylene with a second metathesis catalyst, which may be the same or different than the first metathesis catalyst, to convert at least a portion of the propylene to ethylene and 2-butene and form a second metathesis product.