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a third bottom stream from the third fractionator; characterised in that at least a part of the third bottom stream is withdrawn as a purge stream.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：US20220204719A1

公开(公告)日：2022-06-30

申请号：US17624609

申请日：2020-07-06

Applicant: BOREALIS AG

Inventor： Sameer VIJAY

IPC: C08J11/06 ,  B29B17/00 ,  B29B17/02

Abstract: Disclosed is a process for treating plastic waste chips containing a blend of polypropylene and polyethylene in an amount of at least 83.0 wt.-% to less than 100 wt.-% and further containing C7 to C11 aldehydes in an amount of 8000 ppb to 20000 ppb limonene in an amount of 5 ppm to 500 ppm, the process comprising subjecting said plastic waste chips, in a fixed bed without stirring under standard pressure or reduced pressure, to a gas flow for achieving a Reynolds number in the range of 35 to 1200 at a temperature in the range of 20° C. to a point 10° C. below the Vicat softening point (10N, ISO 306) of said plastic waste and recovering the treated plastic waste chips containing C7 to C11 aldehydes in a total amount of 50 ppb to less than 5000 ppb limonene in an amount of 0.5 to 5 ppm.

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：US20210009414A1

公开(公告)日：2021-01-14

申请号：US16971846

申请日：2019-02-22

Applicant: BOREALIS AG

Inventor： Sameer VIJAY

IPC: C01B3/50 ,  C08F2/01 ,  C08F2/06 ,  C08F4/42 ,  C08F210/16 ,  C08F10/02

Abstract: The invention provides a process for separating hydrogen from a gaseous feed stream in a polymerisation process, comprising the steps i) polymerising an olefin monomer and optionally at least one olefin comonomer, in the presence of a solvent optionally in the presence of hydrogen, so as to form a polymerisation reaction mixture comprising a polyolefin polymer, unreacted monomer(s), solvent and hydrogen; ii) separating said polyolefin polymer from said unreacted monomer(s), solvent and hydrogen; iii) feeding said unreacted monomer(s) and hydrogen to a condenser so as to form said gaseous feed stream; iv) contacting said gaseous feed stream with a hydrogen separating membrane so as to form a hydrogen-rich gaseous stream and a hydrogen-lean gaseous stream.

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.