公开(公告)号：US20180371201A1

公开(公告)日：2018-12-27

申请号：US16065066

申请日：2016-12-21

Applicant: BOREALIS AG

Inventor： Mohammad AL-HAJ ALI ,  Michiel BERGSTRA ,  Erik ERIKSSON ,  Guhan MATHIVANAN ,  Jukka RÄSÄNEN ,  Henry SLEIJSTER ,  Sameer VIJAY ,  Christof WURNITSCH ,  Samuli ZITTING ,  Vasileios KANELLOPOULOS ,  Jani AHO

IPC: C08J11/02 ,  C08F210/16 ,  C08F2/00 ,  C08F6/00

Abstract: The present invention deals with a process for polymerising olefins in a solution and withdrawing a stream of the solution from the polymerisation reactor and passing it to a sequence of heating steps. The heated solution is passed to a separation step, which is conducted at a pressure of no more than 15 bar and in which separation step a liquid phase comprising the polymer and a vapour phase coexist. A vapour stream and a concentrated solution stream comprising the polymer are withdrawn from the separation step. At least a part of the vapour stream is passed to the first polymerisation reactor, to the second polymerisation reactor or to both.