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    METHOD OF RECOVERING OLEFINS IN A SOLUTION POLYMERISATION PROCESS
    1.
    发明申请
    METHOD OF RECOVERING OLEFINS IN A SOLUTION POLYMERISATION PROCESS 有权

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a third bottom stream from the third fractionator; characterised in that at least a part of the third bottom stream is withdrawn as a purge stream.

    A PROCESS FOR RECOVERING HYDROCARBONS IN A SOLUTION POLYMERISATION PROCESS
    3.
    发明申请
    A PROCESS FOR RECOVERING HYDROCARBONS IN A SOLUTION POLYMERISATION PROCESS 审中-公开

    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.

    Catalyst Feed System
    4.
    发明公开
    Catalyst Feed System 审中-公开

    公开(公告)号：US20240001317A1

    公开(公告)日：2024-01-04

    申请号：US18254729

    申请日：2021-11-04

    Applicant: Borealis AG

    Inventor： Klaus NYFORS ,  Jouni KIVELÄ ,  Mubashar SATTAR ,  Samuli ZITTING ,  Erno ELOVAINIO ,  Mikko LYLYKANGAS ,  Jan LINDHOLM ,  Danny COX

    IPC: B01J8/00 ,  B01J8/18 ,  B01J8/22 ,  C08F10/00

    CPC classification number: B01J8/0035 ,  B01J8/002 ,  B01J8/003 ,  B01J8/1809 ,  B01J8/22 ,  C08F10/00 ,  B01J2208/0061 ,  B01J2208/00752

    Abstract: The present invention relates to a process for feeding a polymerization catalyst into a polymerization reactor, said process comprising the steps of: (i) forming a catalyst slurry comprising oil and a solid catalyst component in a first catalyst preparation vessel; (ii) transferring the catalyst slurry from the first catalyst preparation vessel to a first catalyst feed vessel; (iii) maintaining the catalyst slurry in the first catalyst feed vessel in a homogeneous state; (iv) withdrawing a portion of the catalyst slurry from the first catalyst feed vessel, preferably continuously withdrawing the catalyst slurry from the first catalyst feed vessel, and introducing the withdrawn portion of the catalyst slurry into a polymerization reactor; wherein the oil has a dynamic viscosity of from 25 to 1500 mPa*s at the conditions within the first catalyst preparation vessel and the first catalyst feed vessel, wherein the catalyst slurry is transferred along a substantially vertical path downwards from the first catalyst feed vessel to the reactor.

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