PROPYLENE PRODUCTION PROCESS WITH HEAVIES RECYCLE

摘要

Processes for forming propylene are described herein. The processes generally include reacting a metathesis feed stream including n-butene with ethylene in the presence of a metathesis catalyst via a metathesis reaction to form a metathesis product stream including propylene, ethylene, butene and C5+ olefins; separating the propylene from the ethylene, butene and C5+ olefins in the metathesis product stream; and recycling at least a portion of the C5+ olefins to the metathesis reaction.