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    IMPROVING CATALYST PERFORMANCE IN MULTI-STAGE POLYOLEFIN PRODUCTION
    6.
    发明申请
    IMPROVING CATALYST PERFORMANCE IN MULTI-STAGE POLYOLEFIN PRODUCTION 审中-公开

    公开(公告)号：WO2022268959A1

    公开(公告)日：2022-12-29

    申请号：PCT/EP2022/067183

    申请日：2022-06-23

    申请人： BOREALIS AG

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

    IPC分类号： C08F210/16 ,  C08F2/00 ,  C08F2/01 ,  C08F4/659

    摘要： The disclosure relates to à 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.

    PROCESS FOR PRODUCING POLYETHYLENE POLYMERS
    7.
    发明申请
    PROCESS FOR PRODUCING POLYETHYLENE POLYMERS 审中-公开

    公开(公告)号：WO2022268953A1

    公开(公告)日：2022-12-29

    申请号：PCT/EP2022/067176

    申请日：2022-06-23

    申请人： BOREALIS AG

    发明人： CASTRO, Pascal ,  KANELLOPOULOS, Vasileios ,  KIPIANI, Georgy ,  MUSTONEN, Marja ,  SAEED, Irfan

    IPC分类号： C08F210/16 ,  C08F4/659 ,  C08F2420/07 ,  C08F4/65912 ,  C08F4/65916

    摘要： The disclosure relates to a process for polymerising olefins, the process comprising polymerising ethylene, optionally in the presence of at least one other alpha olefin comonomer, preferably C4-C10 alpha olefin comonomer, preferably in multi stage polymerisation process configuration, in the presence of a single-site polymerisation catalyst to produce a polymer component to produce a polyethylene polymer or a polyethylene copolymer, wherein the single-site polymerisation catalyst comprises (i) a transition metal complex; (ii) a cocatalyst; and optionally (iii) a support; and is characterised by a (Weibull modulus) x (scale parameter) product equal to or higher than 40 MPa and a (Weibull modulus) / (scale parameter) ratio equal to or lower than 0.50 MPa-1 wherein the Weibull modulus and the scale parameter are determined by the Weibull analysis of the compressive strength of the catalyst particles. The disclosure further relates to a single- site polymerisation catalyst, comprising (i) a transition metal complex; (ii) a cocatalyst; and optionally (iii) a support, preferably a silica support; wherein the single-site polymerisation catalyst is characterised by a (Weibull modulus) x (scale parameter) product equal to or higher than 40 MPa and a (Weibull modulus) / (scale parameter) ratio equal to or lower than 0.50 MPa-1 wherein the Weibull modulus and the scale parameter are determined by the Weibull analysis of the compressive strength of the catalyst particles. The disclosure further relates to use of the single-site polymerisation catalyst in the preparation of a polyethylene polymer component, a polyethylene polymer, or a polyethylene copolymer.

    USE OF A SWELLING AGENT IN MULTI-STAGE POLYOLEFIN PRODUCTION
    8.
    发明申请
    USE OF A SWELLING AGENT IN MULTI-STAGE POLYOLEFIN PRODUCTION 审中-公开

    公开(公告)号：WO2022268951A1

    公开(公告)日：2022-12-29

    申请号：PCT/EP2022/067173

    申请日：2022-06-23

    申请人： BOREALIS AG

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

    IPC分类号： C08F210/16 ,  C08L23/08 ,  C08F2/00 ,  C08F2/38 ,  C08F4/65912 ,  C08F4/65916 ,  C08L2205/025 ,  C08L23/0815 ,  C08L2308/00

    摘要： 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.