Patent ID: 9242908
Filing Date: 2016-01-26
CPC Classification: B01J,C07C,Y02P

Claim Text:
1. A process for the production of C 4 olefins, the process comprising: contacting a hydrocarbon mixture comprising alpha-pentenes with an isomerization catalyst to form an isomerization product comprising beta-pentenes; 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 fractionating the first metathesis product to form an ethylene fraction, a propylene fraction, a butene fraction, and a C 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.