Process for direct conversion of a feed comprising olefins containing four and/or five carbon atoms, for the production of propylene with co-production of desulphurized gasoline with a high octane number

摘要

The invention concerns a process for producing propylene and co-producing desulphurized gasoline with a high octane number from a catalytically cracked gasoline cut, and a steam cracking C4/C5 cut comprising at least one one-step oligocracking unit, a selective hydrogenation unit for FCC gasoline and a hydrotreatment unit.