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    Combined sequential parallel reactor configuration
    2.
    发明授权
    Combined sequential parallel reactor configuration 有权

    公开(公告)号：US11421057B2

    公开(公告)日：2022-08-23

    申请号：US16640404

    申请日：2018-10-23

    申请人： BOREALIS AG

    发明人： Shital Das ,  Kauno Alastalo

    IPC分类号： C08F210/16 ,  C08F2/34 ,  B01J19/24

    摘要： The present invention relates to multi reactor configurations for producing polypropylene copolymers and to processes for producing polypropylene copolymers. The reactor configuration for the production of propylene copolymers comprises at least three reactors R1, R1 and R3, all reactors having inlet and outlet, whereby reactors R2 and R3 are configured in parallel both downstream of reactor R1; and whereby reactor R1 is configured in series and upstream of reactors R2 and R3, and whereby the outlet of reactor R1 is coupled with the inlets of both reactors R2 and R3.

    PROCESS FOR THE PRODUCTION OF POLYOLEFIN COMPOSITIONS IN A MULTISTAGE PROCESS
    3.
    发明公开
    PROCESS FOR THE PRODUCTION OF POLYOLEFIN COMPOSITIONS IN A MULTISTAGE PROCESS 审中-公开

    公开(公告)号：US20240010764A1

    公开(公告)日：2024-01-11

    申请号：US18039535

    申请日：2021-11-18

    申请人： Borealis AG

    发明人： Shital Das ,  Kauno Alastalo ,  Antonina Kupareva ,  Stefan Bruckbauer ,  Henrik M.F.J. Kortejarvi ,  Erno Elovainio

    IPC分类号： C08F10/06 ,  B01J19/24 ,  B01J8/24

    CPC分类号： C08F10/06 ,  B01J19/2435 ,  B01J8/24 ,  B01J2219/0004

    摘要： The present invention relates to a process and apparatus for producing alpha-olefin polymers in the presence of a polymerization catalyst in a continuously operated multistage polymerisation sequence, the process comprising the steps of (a) polymerizing an alpha-olefin monomer and optionally one or more alpha-olefin co-monomers in a slurry reactor in the presence of a hydrocarbon diluent or liquid monomer in a slurry phase to obtain an alpha-olefin polymer, the slurry phase having a first concentration of solids, (b) continuously withdrawing from the slurry reactor a polymer slurry containing polymer and a fluid phase, (c) concentrating at least a part of the polymer slurry by removing a part of the fluid phase to provide a 1st product stream comprising a concentrated slurry having a second solids concentration, which is higher than the first solids concentration, and a 2nd product stream mainly comprising the fluid phase, (d) polymerizing said 1st product stream in the presence of alpha-olefin monomers and optionally one or more alpha-olefin co-monomers in a first gas phase reactor (GPR1) arranged downstream of said slurry reactor to obtain a 1st alpha-olefin product stream, (e) polymerizing a 3rd product stream, withdrawn from said slurry reactor, in the presence of alpha-olefin monomers and optionally one or more alpha-olefin co-monomers in a second gas phase reactor (GPR2) to obtain a 2nd alpha-olefin product stream.