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1.发明申请公开(公告)号：US20200346180A1
公开(公告)日：2020-11-05
申请号：US16765103
申请日：2018-10-25
Applicant: Borealis AG
Inventor： Günter WEICKERT , Eric-Jan PRINSEN , Klaus NYFORS , Erno ELOVAINIO , Vasileios KANELLOPOULOS
Abstract: The present invention relates to a process for polymerizing olefin monomer(s) in a gas solids olefin polymerization reactor wherein the fluidization gas is split and returned to the reactor into the bottom zone of the reactor and directly into the dense phase formed by particles of a polymer of the olefin monomer(s) suspended in an upwards flowing stream of the fluidization gas in the middle zone of the reactor.
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公开(公告)号：US20180155465A1
公开(公告)日：2018-06-07
申请号：US15569954
申请日：2016-06-10
Applicant: Borealis AG
Inventor： Vasileios KANELLOPOULOS , Klaus NYFORS , Pablo Ivan AGUAYO ARELLANO , Gunter WEICKERT , Eric-Jan PRINSEN
Abstract: The present invention deals with an olefin polymerisation process. At least one olefin is polymerised 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. Fluidisation gas is introduced to the bottom zone of the reactor from where it passes upwards through the reactor, and withdrawn from the top zone of the reactor. The gas is then compressed, cooled and returned into the bottom zone of the reactor. A fluidised bed is thus formed within the reactor where the growing polymer particles are suspended in the upwards rising gas stream wherein the superficial velocity of the fluidisation gas is less than the transport velocity of the particles. There is no fluidisation grid in the reactor. The fluidisation gas is passed from an inlet chamber into the bottom zone and the gas flows from the upper part of the inlet chamber to the lower part thereof and the gas flows from the lower part of the inlet chamber to the bottom zone.
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公开(公告)号：US20210370255A1
公开(公告)日：2021-12-02
申请号：US16765090
申请日：2018-10-25
Applicant: Borealis AG
Inventor： Günter WEICKERT , Eric-Jan PRINSEN , Klaus NYFORS , Erno ELOVAINIO , Vasileios KANELLOPOULOS
Abstract: The present invention relates to a method for improving the cooling capacity of a gas solids olefin polymerization reactor by splitting the fluidization gas and returning part of the fluidization gas to the reactor into the bottom zone of the reactor and another part of the fluidization gas directly into the dense phase formed by particles of a polymer of the at least one olefin suspended in an upwards flowing stream of the fluidization gas in the middle zone of the reactor.
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公开(公告)号：US20200369806A1
公开(公告)日：2020-11-26
申请号：US16065597
申请日：2016-12-15
Applicant: BOREALIS AG
Inventor： Mohammad AL-HAJ ALI , Vasileios KANELLOPOULOS , Apostolos KRALLIS , Klaus NYFORS , Pablo Ivan AGUAYO ARELLANO , Gunter Weickert , Eric-Jan PRINSEN
IPC: C08F210/16 , B01J8/18 , B01J8/00
Abstract: The present invention relates to a process and apparatus for withdrawing polymer agglomerates from a fluidised bed polymerisation reactor, the polymerisation reactor comprising a bottom zone having a generally conical shape and no fluidisation grid. The agglomerates are withdrawn by using an agglomerate trap below the bottom zone. A value of a process variable indicative of the content of agglomerates in the agglomerate trap is measured and the opening time of the valves transferring polymer to and from the agglomerate trap is adjusted based on the measured value.
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