PROCESS AND SYSTEM FOR THE PRODUCTION OF ISOPRENE

摘要

Disclosed herein is a process for producing isoprene that includes reacting amixed C4 metathesis feed stream comprisingisobutylene and at least one of 1-butene and 2-pentene in a first metathesisreactor in the presence of a first metathesis catalystunder conditions sufficient to produce an intermediate product streamcomprising at least 30 wt. % 2-methyl-2-pentene basedupon the olefin content of fresh feed in the mixed C4 feed stream, and atleast one of ethylene and propylene, separating the2-methyl-2-pentene, subjecting the separated 2-methyl-2-pentene to pyrolysisto produce a reaction product stream comprising isoprene,and separating the isoprene into an isoprene product stream usingfractionation. A system used in producing isoprene isalso disclosed.