公开(公告)号：US20210171677A1

公开(公告)日：2021-06-10

申请号：US16768601

申请日：2018-11-22

Applicant: Borealis AG

Inventor： Mohammad AL-HAJ ALI ,  Erik ERIKSSON ,  Guhan MATHIVANAN ,  Jukka RÄSÄNEN ,  Henry SLEIJSTER ,  Sameer VIJAY ,  Samuli ZITTING

IPC: C08F210/16 ,  C08F6/04 ,  C08F6/00 ,  B01J19/06 ,  B01D3/14

Abstract: The present invention relates to a process for removing hydrocarbons comprising the steps of: (A) passing a stream of a solution into a separator wherein a liquid phase comprising polymer and a vapour phase coexist; (B) withdrawing a vapour stream and a concentrated solution stream from the separator; (C) passing at least a part of the vapour stream into a first fractionator; (D) withdrawing a first overhead stream and a first bottom stream from the first fractionator; (E) passing the first overhead stream to a second fractionator; (F) withdrawing a second overhead stream and a second bottom stream from the second fractionator; (G) passing the second overhead stream to a third fractionator; (H) withdrawing a third overhead stream and a third bottom stream from the third fractionator; characterised in that at least a part of the third bottom stream is withdrawn as a purge stream.

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 A vapour stream and a concentrated solution stream comprising the polymer are withdrawn from the separation step.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.

公开(公告)号：US20180355075A1

公开(公告)日：2018-12-13

申请号：US15781733

申请日：2016-12-21

Applicant: Borealis AG

Inventor： Mohammad AL-HAJ ALI ,  Erik ERIKSSON ,  Guhan MATHIVANAN ,  Henry SLEIJSTER ,  Sameer VIJAY ,  Christof WURNITSCH ,  Samuli ZITTING

IPC: C08F6/12 ,  C08F6/04 ,  C08F2/06 ,  B01D3/14 ,  B01D3/42

Abstract: The present invention relates to a process for producing a polymer composition comprising the steps of: (A) polymerising, in a first polymerisation reactor in a first solvent,—a first olefin monomer having two or more carbon atoms, —in the presence of a first polymerisation catalyst for producing a first solution comprising a first polymer of the first olefin monomer and the first solvent; (B) withdrawing a first stream of the first solution from the first polymerisation reactor; (C) passing the first stream of the first solution into a first separator wherein a first liquid phase comprising the polymer and a first vapour phase coexist; (D) withdrawing a first vapour stream and a first concentrated solution stream comprising the polymer from the first separator; (E) passing at least a part of the first vapour stream to a first fractionator; (F) withdrawing a first overhead stream and a first bottom stream from the first fractionator; (G) recovering at least a part of the first overhead stream as a first recycle stream and passing it to the first polymerisation reactor; (H) passing the first concentrated solution stream from the first separator (4) to a second separator (8) wherein a second liquid phase comprising the polymer and a second vapour phase coexist; (I) withdrawing a second vapour stream and a second concentrated solution stream comprising the polymer from the second separator; (J) passing at least a part of the second pour stream to a second fractionator; (K) withdrawing a second overhead stream and a second bottom stream from the second fractionator; (L) recovering at least a part of the second overhead stream as a second recycle stream and passing it to the first polymerisation reactor; (M) passing the second concentrated solution stream from the second separator to a third separator wherein a third liquid phase comprising the polymer and a third vapour phase coexist; characterised in that the mass flow rate of the first recycle stream is at least 80% of the mass flow rate of the first vapour stream and the mass flow rate of the second recycle stream is at least 70% of the mass flow rate of the second vapour stream.