公开(公告)号：US20210198166A1

公开(公告)日：2021-07-01

申请号：US17057660

申请日：2019-05-23

Applicant: TECHNIP FRANCE

Inventor： Véronique REICH ,  Bruno DESTOUR

IPC: C07C6/04 ,  C07C7/04 ,  C07C4/04 ,  B01J19/24 ,  C07C4/06 ,  C07C7/00 ,  B01D3/14 ,  B01D3/42

Abstract: A method for producing a stream of propylene and associated facility are described. The method includes: an introduction of a feed cut rich in C4 and/or C5 hydrocarbons, and at least one cut rich in ethylene into a metathesis reactor; an introduction of a metathesis product in a deethylenizer; a production of an overhead stream rich in ethylene and a feed stream; an introduction of the feed stream into a depropylenizer and recovery of a bottom stream containing C4+ hydrocarbons; a recovery, from an overhead stream of the depropylenizer, of the propylene stream; a lateral withdrawal of a recycle stream and return of the recycle stream to the metathesis reactor; a lateral draw-off, in the depropylenizer, of a purge rich in C4 paraffinic hydrocarbons and/or rich in isobutene.