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    IMPROVING CATALYST PERFORMANCE IN MULTI-STAGE POLYOLEFIN PRODUCTION
    2.
    发明公开
    IMPROVING CATALYST PERFORMANCE IN MULTI-STAGE POLYOLEFIN PRODUCTION 审中-公开

    公开(公告)号：US20240294681A1

    公开(公告)日：2024-09-05

    申请号：US18572405

    申请日：2022-06-23

    Applicant: BOREALIS AG

    Inventor： Vasileios KANELLOPOULOS ,  Joana Elvira KETTNER ,  Matthias HOFF ,  Apostolos KRALLIS ,  Victor SUMERIN ,  Jani AHO ,  Kalle KALLIO ,  Irfan SAEED ,  Erno ELOVAINIO

    IPC: C08F210/16 ,  C08F2/00 ,  C08F2/01 ,  C08F2/34 ,  C08F2/38 ,  C08F4/6592

    CPC classification number: C08F210/16 ,  C08F2/001 ,  C08F2/01 ,  C08F2/34 ,  C08F2/38 ,  C08F4/6592

    Abstract: The disclosure relates to a process for polymerising olefins in multi stage polymerisation process configuration, the process comprising a) polymerising in a first polymerisation step first olefin monomer, optionally in the presence of at least one other alpha olefin comonomer, in the presence of a metallocene polymerisation catalyst so as to form a first polymer component (A); and b) transferring the first polymer component (A) into a separation unit to remove low molecule penetrants and to obtain separated solid polyolefin particles of the first polymer component (A*) and c) polymerising in in gas phase in a second polymerisation step second olefin monomer, optionally in the presence of at least one other alpha olefin comonomer in the presence of the separated solid polyolefin particles (A*) of step b), so as to form a second polymer component (B). The disclosure further relates to a method for improving performance of a metallocene polymerisation catalyst in a multi-stage olefin polymerisation, wherein a first polymer component (A) produced in a first polymerisation step is transferred into a separation unit to remove low molecule penetrants and to obtain separated solid polyolefin particles of the first polymer component (A*) prior to transferring the obtained separated solid polyolefin particles of the first polymer component (A*) to a further polymerisation step.

    UTILIZATION OF 1-HEXENE IN MULTI-STAGE POLYOLEFIN PRODUCTION
    4.
    发明公开
    UTILIZATION OF 1-HEXENE IN MULTI-STAGE POLYOLEFIN PRODUCTION 审中-公开

    公开(公告)号：US20240317901A1

    公开(公告)日：2024-09-26

    申请号：US18572410

    申请日：2022-06-23

    Applicant: BOREALIS AG

    Inventor： Victor SUMERIN ,  Vasileios KANELLOPOULOS ,  Jani AHO ,  Matthias HOFF ,  Joana Elvira KETTNER ,  Irfan SAEED ,  Kalle KALLIO ,  Apostolos KRALLIS

    IPC: C08F2/00 ,  C08F2/34 ,  C08F4/659 ,  C08F210/16

    CPC classification number: C08F2/001 ,  C08F2/34 ,  C08F4/65912 ,  C08F210/16 ,  C08F2400/02

    Abstract: The disclosure relates to a process for polymerising olefins in multi stage polymerisation process configuration, the process comprising a) polymerising in a first polymerisation step ethylene, optionally in the presence of at least one other alpha olefin comonomer, in the presence of a polymerisation catalyst so as to form a first polymer component (A); and b) polymerising in a second polymerisation step in gas phase a predetermined monomer mixture comprising ethylene and 1-hexene, optionally in the presence of at least one other alpha olefin comonomer, in the presence of the first polymer component (A) of step a), so as to form a second polymer component (B), wherein the multimodal polyethylene polymer produced by the present process comprises 1-hexene comonomer and at least one further C4-10-comonomer, and wherein the predetermined monomer mixture comprising ethylene and 1-hexene is fed into the second polymerisation step from the beginning of its start up. The disclosure further relates to use of 1-hexene in a gas phase olefin polymerisation step for improving performance of single-site polymerisation catalyst in multi-stage olefin copolymerisation process. The disclosure still further relates to a method for improving performance of single-site polymerisation catalyst in a multi-stage olefin polymerisation comprising feeding a predetermined monomer mixture comprising ethylene and 1-hexene into the gas phase polymerisation step from the beginning of its start up.

    USE OF A SWELLING AGENT IN MULTI-STAGE POLYOLEFIN PRODUCTION
    5.
    发明公开
    USE OF A SWELLING AGENT IN MULTI-STAGE POLYOLEFIN PRODUCTION 审中-公开

    公开(公告)号：US20240301104A1

    公开(公告)日：2024-09-12

    申请号：US18572402

    申请日：2022-06-23

    Applicant: BOREALIS AG

    Inventor： Matthias HOFF ,  Joana Elvira KETTNER ,  Vasileios KANELLOPOULOS ,  Victor SUMERIN ,  Jani AHO ,  Apostolos KRALLIS ,  Kalle KALLIO ,  Irfan SAEED ,  Erno ELOVAINIO

    IPC: C08F210/16 ,  C08L23/08

    CPC classification number: C08F210/16 ,  C08L23/0815 ,  C08L2205/025 ,  C08L2308/00

    Abstract: The disclosure relates to a process for polymerising olefins in multi stage polymerisation process configuration, comprising a) polymerising in a first polymerisation step first olefin monomer, optionally in the presence of at least one other alpha olefin monomer, in the presence of a polymerisation catalyst so as to form a first polymer component (A), and b) polymerising in a second polymerisation step in gas phase second olefin monomer, optionally in the presence of at least one other alpha olefin comonomer, in the presence of the first polymer component (A) of step a) and an induced swelling agent, so as to for a second polymer component (B), wherein the first polymer component (A) and the second polymer component (B) are produced at production rates meeting a predetermined target weight ratio of the second polymer component (B) to the first polymer component (A), the process comprising the steps of: i) determining a first weight ratio of the second polymer component (B) to the first polymer component (A) in the second polymerisation step, and ii) increasing the concentration of the induced swelling agent in the second polymerisation step if the determined first weight ratio is less than the predetermined target weight ratio, or iii) decreasing the concentration of the induced swelling agent in the second polymerisation step if the determined first weight ratio is greater than the predetermined target weight ratio, or iv) maintaining the concentration of the induced swelling agent in the second polymerisation step if the determined first weight ratio equals the predetermined target weight ratio. The disclosure further relates to use of an induced swelling agent in a gas phase polymerisation step for improving gas phase production split in a multi-stage olefin polymerisation process.

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