公开(公告)号：ZA201201624B

公开(公告)日：2012-11-28

申请号：ZA201201624

申请日：2012-03-05

Applicant: LUMMUS TECHNOLOGY INC

Inventor： GARTSIDE ROBERT J ,  KLEINDIENST SHANE R

IPC: C07C20060101

Abstract: Disclosed herein is a process for producing isoprene that includes reacting a mixed C4 metathesis feed stream comprising isobutylene and at least one of 1-butene and 2-pentene in a first metathesis reactor in the presence of a first metathesis catalyst under conditions sufficient to produce an intermediate product stream comprising at least 30 wt. % 2-methyl-2-pentene based upon the olefin content of fresh feed in the mixed C4 feed stream, and at least one of ethylene and propylene, separating the 2-methyl-2-pentene, subjecting the separated 2-methyl-2-pentene to pyrolysis to produce a reaction product stream comprising isoprene, and separating the isoprene into an isoprene product stream using fractionation. A system used in producing isoprene is also disclosed.