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.

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：US20150259446A1

公开(公告)日：2015-09-17

申请号：US14723016

申请日：2015-05-27

Applicant: BOREALIS AG

Inventor： Ilke SENOL ,  Erik ERIKSSON ,  Kauno ALASTALO ,  Pauli LESKINEN ,  Klaus NYFORS

IPC: C08F110/02

CPC classification number: C08F110/02 ,  C08F2/14 ,  C08F10/02 ,  C08F2/001 ,  C08F2500/12

Abstract: A process including polymerizing ethylene in the presence of a polymerization catalyst and hydrogen in a first polymerization reactor to produce a first slurry; withdrawing a first stream of the slurry from the first polymerization reactor; directing the slurry stream into a second polymerization reactor; polymerizing ethylene in the presence of the first ethylene polymer, the polymerization catalyst, and hydrogen in a second polymerization reactor to produce a second slurry; withdrawing from the second polymerization reactor a second slurry stream having a solids concentration higher than the average solids concentration of the second slurry within the second polymerization reactor; withdrawing from the second polymerization reactor a third slurry stream having a solids concentration lower than the average solids concentration of the second slurry within the second polymerization reactor; and directing at least a part of the second slurry stream into one of the first and second polymerization reactors.

Abstract translation: 一种方法，包括在聚合催化剂和氢存在下在第一聚合反应器中聚合乙烯以产生第一浆料; 从第一聚合反应器中取出第一浆料流; 将浆料流引导到第二聚合反应器中; 在第二聚合反应器中在第一乙烯聚合物，聚合催化剂和氢的存在下聚合乙烯以产生第二浆料; 从所述第二聚合反应器中排出具有高于所述第二聚合反应器内的所述第二浆料的平均固体浓度的固体浓度的第二浆料流; 从所述第二聚合反应器中排出具有低于所述第二聚合反应器内的所述第二浆料的平均固体浓度的固体浓度的第三浆料流; 以及将所述第二浆料流的至少一部分引导到所述第一和第二聚合反应器之一中。

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.