公开(公告)号：US11629108B2

公开(公告)日：2023-04-18

申请号：US16614799

申请日：2018-05-17

Applicant: TECHNIP FRANCE

Inventor： Yvon Simon ,  Bruno Destour ,  Marco Valente

IPC: C07C7/00 ,  B01D53/18 ,  C07C7/04 ,  C07C7/09 ,  C07C7/11 ,  C10G70/04 ,  C10G70/06 ,  F25J3/02

Abstract: This method comprises passing a residual stream into a flash drum to form a gaseous overhead flow and liquid bottom flow, and feeding the bottom flow into a distillation column,
It comprises cooling the overhead flow in a heat exchanger to form a cooled overhead flow.
It comprises the extraction of a gaseous overhead stream at the head of the distillation column, and the formation of at least one effluent stream from the overhead stream and/or from the top stream.
The separation of the cooled overhead flow comprises passing the cooled overhead flow into an absorber, and injecting a methane-rich stream into the absorber to place the cooled overhead flow in contact with the methane-rich stream.