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    Process for recovering hydrocarbons in a solution polymerisation process
    1.
    发明授权
    Process for recovering hydrocarbons in a solution polymerisation process 有权

    公开(公告)号：US10759880B2

    公开(公告)日：2020-09-01

    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 ,  C08F2/06 ,  C08F6/00 ,  B01D3/14 ,  B01D3/42 ,  C08F6/04 ,  C08F10/02 ,  C08F10/06 ,  C08F36/02

    Abstract: A process for producing a polymer composition comprising the steps (A) to (M) as recited herein, involving the polymerization, in a polymerization reactor of a first polymer, a first stream thereof being passed into a first separator wherein a first liquid phase comprising the polymer and a first vapor phase coexist; withdrawing a first vapor stream and a first concentrated solution stream comprising the polymer from the first separator, passing at least a part of the first vapor stream to a first fractionator; withdrawing a first overhead stream and a first bottom stream from the first fractionator; recovering at least a part of the first overhead stream as a first recycle stream and passing it to the polymerization reactor; passing the first concentrated solution stream from the first separator to a second separator, wherein a second liquid phase comprising the polymer and a second vapor phase coexist; passing at least a part of the second vapor stream to a second fractionator; withdrawing a second overhead stream and a second bottom stream from the second fractionator; recovering at least a part of the second overhead stream as a second recycle stream and passing it to the polymerization reactor; wherein the mass flow rate of the first recycle stream is at least 80% of the mass flow rate of the first vapor stream and the mass flow rate of the second recycle stream is at least 70% of the mass flow rate of the second vapor stream.

    PROCESS FOR WITHDRAWING POLYOLEFINS
    2.
    发明申请
    PROCESS FOR WITHDRAWING POLYOLEFINS 审中-公开

    公开(公告)号：US20180327522A1

    公开(公告)日：2018-11-15

    申请号：US15776089

    申请日：2016-12-21

    Applicant: Borealis AG

    Inventor： Mohammad Al-Haj Ali ,  Erik Eriksson ,  Sameer Vijay ,  Guhan Mathivanan ,  Jukka Rasanen ,  Henry Sleijster ,  Christof Wurnitsch ,  Samuli Zitting

    IPC: C08F6/12 ,  C08F6/00 ,  B01J8/00

    CPC classification number: C08F6/12 ,  B01J8/0015 ,  C08F6/003 ,  C08L23/02

    Abstract: A process for withdrawing polyolefins from a solution polymerization reactor comprising: providing—a low pressure separator 1,—a washing column 2,—a withdrawal line 3 connecting the upper part of the low pressure separator and the washing column—a condenser 4,—a condenser-line 5 connecting the top part of the washing column and the condenser—optionally a recycle solvent vessel 6—optionally a solvent-vessel-line 7 connecting the condenser with the recycle solvent vessel—a reflux line 8 connecting the condenser and the upper part of the washing column or connecting the recycle solvent vessel and the upper part of the washing column—optionally a circulation line 9 fluidly connected to the middle part of the washing column and recycling line 10—a recycling line 10 connecting the bottom of the washing column and the upper part of the low pressure separator,—optionally a wash recycle heater 11 embedded into the recycling line 10—optionally a heater 12 embedded into the circulation line 9 (a) continuously withdrawing a liquid solution stream from the solution polymerization reactor and passing said liquid solution stream into the first low pressure separator 1; (b) withdrawing a first vapour stream and a first liquid stream from the low pressure separator and passing said first vapour stream via withdrawal line 3 into the washing column (c) withdrawing a second vapour stream from the washing column and feeding it via condenser line 5 to condenser 4 (d) cooling the second vapour stream in condenser 4 so that a part of the second vapour stream condenses thereby producing a condensed second vapour stream and an uncondensed second vapour stream (e) passing the condensed second vapour stream to the upper part of the washing column via reflux line 8 (f) withdrawing a second liquid stream from the washing column and passing at least a part of the second liquid stream to the low pressure separator via recyling line 10 (g) recovering heat from the condenser

    Polymerization reactor system comprising at least one withdrawal valve
    3.
    发明授权
    Polymerization reactor system comprising at least one withdrawal valve 有权

    公开(公告)号：US11708425B2

    公开(公告)日：2023-07-25

    申请号：US16646767

    申请日：2018-11-02

    Applicant: Borealis AG

    Inventor： Christof Wurnitsch ,  Sameer Vijay ,  Erno Elovainio

    IPC: C08F2/01 ,  B01J4/00 ,  B01J19/18 ,  B01J19/24 ,  C08F10/00

    CPC classification number: C08F2/01 ,  B01J4/001 ,  B01J4/008 ,  B01J19/1837 ,  B01J19/2435 ,  C08F10/00 ,  B01J2204/005

    Abstract: Described herein is a polymerization reactor system comprising at least one loop reactor and/or at least one transfer line, and further comprising at least one withdrawal valve, wherein the at least one withdrawal valve is mounted to a wall of a lower horizontal segment of the loop reactor and/or to a wall of the transfer line, at an angle a of more than 0° and equal to or less than 85°, determined from perpendicular to a tangent of the wall at the mounting position in flow direction of a slurry in the loop reactor and/or in the transfer line. The valve piston of the at least one withdrawal valve comprises a valve plate at an end directed to the at least one loop reactor and/or at an end directed to the at least one transfer line, the valve plate being shaped according to an inner wall of the at least one loop reactor and/or according to an inner wall of the at least one transfer line such that the valve piston is flush with the inner wall of the at least one loop reactor and/or with the inner wall of the at least one transfer line in a closed position of the withdrawal valve. By using such a withdrawal valve, a limitation of the effective withdrawal area can be avoided or at least be reduced such that the liquid slurry can efficiently be withdrawn and the risk of plugging is reduced. Further disclosed is a method for producing an olefin polymer in the inventive polymerization reactor system.

    INITIATOR INJECTION NOZZLE
    6.
    发明公开
    INITIATOR INJECTION NOZZLE 审中-公开

    公开(公告)号：US20240082801A1

    公开(公告)日：2024-03-14

    申请号：US17767761

    申请日：2020-10-13

    Applicant: BOREALIS AG

    Inventor： Christof Wurnitsch ,  Werner Bilina

    IPC: B01J4/00 ,  B01F25/313

    CPC classification number: B01J4/002 ,  B01F25/313 ,  B01F2025/91

    Abstract: The present invention relates to an initiator injection nozzle (1) for mixing an initiator with a process fluid. The initiator injection nozzle comprises a body (10) comprising (i) a process fluid inlet port (11) to receive the process fluid and an outlet port (17); (ii) a process fluid flow passage (13) through which the process fluid traverses along a process fluid central flow axis (15) between the process fluid inlet port (11) and the outlet port (17), the process fluid flow passage 13 having a constricting portion (12), a throat (14) and an expanding portion (16); (iii) an initiator inlet (30) to receive the initiator and an initiator outlet (32); and (iv) an initiator fluid flow passage (34) through which the initiator traverses along an initiator central flow axis (35) between the initiator (inlet 30) and the initiator outlet (32), the process fluid flow passage (13) intersecting the initiator fluid flow passage (34) at the throat (14). At least one elongated vane (20) having a leading end (22) and a trailing end (26) is provided within the process fluid flow passage (13) and extends along the process fluid central flow axis (15), wherein the initiator outlet (32) is disposed on a surface (24) of the vane (20). The initiator injection nozzle is characterised in that the initiator outlet (32) is disposed on a portion of an axial edge (24) of the vane (20).

    In-line blending process
    8.
    发明授权
    In-line blending process 有权

    公开(公告)号：US10597472B2

    公开(公告)日：2020-03-24

    申请号：US15776095

    申请日：2016-12-21

    Applicant: Borealis AG

    Inventor： Henry Sleijster ,  Mohammad Al-Haj Ali ,  Jukka Rasanen ,  Samuli Zitting ,  Michiel Bergstra ,  Erik Eriksson ,  Christof Wurnitsch ,  Guhan Mathivanan ,  Sameer Vijay ,  Vasileios Kanellopoulos ,  Jani Aho ,  Jouni Takakarhu

    IPC: C08J11/02 ,  C08F6/10 ,  C08F210/14 ,  C08F6/00 ,  C08F2/06 ,  C08F6/12 ,  C08F10/00 ,  C08F210/02 ,  B01D1/14 ,  B01D1/00

    Abstract: An in-line blending process for polymers comprising: (a) providing two or more reactor-low pressure separator units (1,7) in parallel configuration, each reactor-low pressure separator unit comprising one reactor (2,8) fluidly connected to one low pressure separator (3,9) downstream and further a recycling line (5,11) connecting the low pressure separator (3,9) back to the corresponding reactor (2,8); (b) polymerizing olefin monomers having two or more carbon atoms in each of the reactors (2,8) in solution polymerisation; (c) forming an unreduced reactor effluents stream including a homogenous fluid phase polymer-monomer-solvent mixture in each of the reactors (2,8), (d) passing the unreduced reactor effluents streams from each of the reactors (2,8) through the corresponding low pressure separators (3,9), whereby the temperature and pressure of the low pressure separators (3,9) is adjusted such that a liquid phase and a vapour phase are obtained, whereby yielding a polymer-enriched liquid phase and a polymer-lean vapour phase, and (e) separating the polymer-lean vapour phase from the polymer-enriched liquid phase in each of the low-pressure separators (3,9) to form separated polymer-lean vapour streams and separated polymer-enriched liquid streams; (f) combining the polymer-enriched liquid streams from step (e) in a further low-pressure separator and/or a mixer (13) to produce a combined polymer-enriched liquid stream (16); (g) reintroducing the polymer-lean vapour streams from step (e) via recycling lines (5,11) into the corresponding reactors (2,8).

    DEVICE FOR MIXING PROCESS FLUID WITH INITIATOR IN A LDPE REACTOR
    9.
    发明公开
    DEVICE FOR MIXING PROCESS FLUID WITH INITIATOR IN A LDPE REACTOR 审中-公开

    公开(公告)号：US20240075441A1

    公开(公告)日：2024-03-07

    申请号：US17767605

    申请日：2020-10-01

    Applicant: BOREALIS AG

    Inventor： Christof Wurnitsch ,  Werner Bilina

    IPC: B01J4/00 ,  B01J19/26

    CPC classification number: B01J4/005 ,  B01J19/26

    Abstract: The present invention relates to an initiator injection nozzle (1) for mixing an initiator with a process fluid. The initiator injection nozzle 1 comprises a body (10) comprising (i) a process fluid inlet port (11) to receive the process fluid and an outlet port (17), (ii) a process fluid flow passage (13) through which the process fluid traverses along a process fluid central flow axis (15) between the process fluid inlet port (11) and the outlet port (17), wherein the process fluid flow passage (13) is at least partially defined by a constricting portion (12), a throat (14), and an expanding portion (16), (iii) an initiator inlet (30) to receive the initiator and an initiator outlet (32), and (iv) an initiator fluid flow passage (34) through which the initiator traverses along an initiator central flow axis (35) between the initiator inlet (30) and the initiator outlet (32). The initiator injection nozzle (1) is characterised by a plurality of elongated vanes (20) provided within the constricting portion (12) and extending along the process fluid central flow axis (15), and in that each of the vanes (20) has a leading end (22), a trailing end (26) and a curved vane surface (21). The plurality of vanes (20) are configured such that an unobstructed process fluid flow cross-section A perpendicular to and including the process fluid central flow axis (15) is located within the constricting portion (12), and that an area of the unobstructed process fluid flow cross-section A becomes larger with increasing distance from the process fluid inlet port (11).

    POLYMERIZATION REACTOR SYSTEM COMPRISING AT LEAST ONE WITHDRAWAL VALVE
    10.
    发明申请
    POLYMERIZATION REACTOR SYSTEM COMPRISING AT LEAST ONE WITHDRAWAL VALVE 审中-公开

    公开(公告)号：US20200207879A1

    公开(公告)日：2020-07-02

    申请号：US16646767

    申请日：2018-11-02

    Applicant: Borealis AG

    Inventor： Christof Wurnitsch ,  Sameer Vijay ,  Erno Elovainio

    IPC: C08F2/01 ,  B01J19/24 ,  B01J19/18 ,  B01J4/00 ,  C08F10/00

    Abstract: Described herein is a polymerization reactor system comprising at least one loop reactor and/or at least one transfer line, and further comprising at least one withdrawal valve, wherein the at least one withdrawal valve is mounted to a wall of a lower horizontal segment of the loop reactor and/or to a wall of the transfer line, at an angle α of more than 0° and equal to or less than 85°, determined from perpendicular to a tangent of the wall at the mounting position in flow direction of a slurry in the loop reactor and/or in the transfer line. The valve piston of the at least one withdrawal valve comprises a valve plate at an end directed to the at least one loop reactor and/or at an end directed to the at least one transfer line, the valve plate being shaped according to an inner wall of the at least one loop reactor and/or according to an inner wall of the at least one transfer line such that the valve piston is flush with the inner wall of the at least one loop reactor and/or with the inner wall of the at least one transfer line in a closed position of the withdrawal valve. By using such a withdrawal valve, a limitation of the effective withdrawal area can be avoided or at least be reduced such that the liquid slurry can efficiently be withdrawn and the risk of plugging is reduced. Further disclosed is a method for producing an olefin polymer in the inventive polymerization reactor system.

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