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    A METHOD, AN ARRANGEMENT AND USE OF AN ARRANGEMENT FOR OLEFIN POLYMERISATION
    32.
    发明申请
    A METHOD, AN ARRANGEMENT AND USE OF AN ARRANGEMENT FOR OLEFIN POLYMERISATION 审中-公开

    公开(公告)号：US20200291143A1

    公开(公告)日：2020-09-17

    申请号：US16606274

    申请日：2018-06-15

    Applicant: Borealis AG

    Inventor： Apostolos Krallis ,  Vasileios Kanellopoulos

    IPC: C08F10/02 ,  B01J8/18

    Abstract: An olefin polymerisation method and arrangement comprising polymerising at least one olefin in gas phase in a fluidised bed in the presence of an olefin polymerisation catalyst in a polymerisation reactor having a vertical body; a generally conical downwards tapering bottom zone; a generally cylindrical middle zone, above and connected to said bottom zone; and a generally conical upwards tapering top zone above and connected to said middle zone wherein (i) fluidisation gas is introduced to the bottom zone of the reactor from where it passes upwards through the reactor; (ii) the fluidisation gas is withdrawn from the top zone of the reactor; (iii) a fluidised bed is formed within the reactor where the growing polymer particles are suspended in the upwards rising gas stream; and wherein the polymerisation reactor has an operating temperature set point and which reactor comprises at least one temperature measurement sensor, wherein a temperature difference (DT) between the temperature measurement sensor (Tm), and the operating temperature set point (Ts) of the reactor is equal to or less than 10° C.

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