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    PROCESS FOR POLYMERIZING OLEFIN IN A GAS PHASE REACTOR WITH IMPROVED THERMAL HOMOGENEITY
    11.
    发明申请
    PROCESS FOR POLYMERIZING OLEFIN IN A GAS PHASE REACTOR WITH IMPROVED THERMAL HOMOGENEITY 有权

    公开(公告)号：US20210130508A1

    公开(公告)日：2021-05-06

    申请号：US17051204

    申请日：2019-05-29

    Applicant: BOREALIS AG

    Inventor： Apostolos Krallis ,  Vasileios Kanellopoulos ,  Erno Elovainio ,  Klaus Nyfors

    IPC: C08F2/34 ,  B01J8/18 ,  B01J8/00

    Abstract: The present invention relates to a process for polymerizing at least one olefin in gas phase in a fluidized bed in a polymerization reactor having a top zone of a generally conical shape as such that the equivalent cross-sectional diameter is monotonically decreasing with respect to the flow direction of the fluidization gas, a middle zone in direct contact with and below said top zone of a generally cylindrical shape and a bottom zone in direct contact and below said middle zone and of a generally conical shape as such that the equivalent cross-sectional diameter is monotonically increasing with respect to the flow direction of the fluidization gas, comprising the steps of: a) introducing a first stream of fluidization gas into the bottom zone; b) polymerizing at least one olefin in the presence of a polymerization catalyst in the fluidized bed 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; c) withdrawing a second stream comprising the fluidization gas and optionally particles of a polymer of the at least one olefin from the top zone; characterized in that the temperature of the particles of the polymer of the at least one olefin in the fluidized bed (TPP) does not exceed 120% of the operating temperature set point (TS) of the polymerization reactor, wherein TPP and TS are both given in ° C., and the use of said process for polymerizing an olefin homo- or copolymer having a narrow particle size distribution.

    Method and apparatus for polymerising olefins in gas phase
    13.
    发明授权
    Method and apparatus for polymerising olefins in gas phase 有权

    公开(公告)号：US10450391B2

    公开(公告)日：2019-10-22

    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

    IPC: C08F2/00 ,  C08F10/02 ,  C08F2/01 ,  C08F2/34 ,  B01J8/18 ,  B01J8/00

    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.

    Method of polymerizing olefins in slurry reactors
    14.
    发明授权
    Method of polymerizing olefins in slurry reactors 有权
    在浆料反应器中聚合烯烃的方法

    公开(公告)号：US09260547B2

    公开(公告)日：2016-02-16

    申请号：US14723016

    申请日：2015-05-27

    Applicant: BOREALIS AG

    Inventor： Ilke Senol ,  Erik Eriksson ,  Kauno Alastalo ,  Pauli Leskinen ,  Klaus Nyfors

    IPC: C08F2/14 ,  C08F2/38 ,  C08F110/02

    CPC classification number: C08F110/02 ,  C08F2/14 ,  C08F10/02 ,  C08F2/001 ,  C08F2500/12

    Abstract: A process including polymerizing ethylene in the presence of a polymerization catalyst and hydrogen in a first polymerization reactor to produce a first slurry; withdrawing a first stream of the slurry from the first polymerization reactor; directing the slurry stream into a second polymerization reactor; polymerizing ethylene in the presence of the first ethylene polymer, the polymerization catalyst, and hydrogen in a second polymerization reactor to produce a second slurry; withdrawing from the second polymerization reactor a second slurry stream having a solids concentration higher than the average solids concentration of the second slurry within the second polymerization reactor; withdrawing from the second polymerization reactor a third slurry stream having a solids concentration lower than the average solids concentration of the second slurry within the second polymerization reactor; and directing at least a part of the second slurry stream into one of the first and second polymerization reactors.

    Abstract translation: 一种方法，包括在聚合催化剂和氢存在下在第一聚合反应器中聚合乙烯以产生第一浆料; 从第一聚合反应器中取出第一浆料流; 将浆料流引导到第二聚合反应器中; 在第二聚合反应器中在第一乙烯聚合物，聚合催化剂和氢的存在下聚合乙烯以产生第二浆料; 从所述第二聚合反应器中排出具有高于所述第二聚合反应器内的所述第二浆料的平均固体浓度的固体浓度的第二浆料流; 从所述第二聚合反应器中排出具有低于所述第二聚合反应器内的所述第二浆料的平均固体浓度的固体浓度的第三浆料流; 以及将所述第二浆料流的至少一部分引导到所述第一和第二聚合反应器之一中。

    LOOP REACTOR PROVIDING AN ADVANCED PRODUCTION SPLIT CONTROL
    15.
    发明申请
    LOOP REACTOR PROVIDING AN ADVANCED PRODUCTION SPLIT CONTROL 有权
    提供高级生产分割控制的循环反应器

    公开(公告)号：US20140378629A1

    公开(公告)日：2014-12-25

    申请号：US14365318

    申请日：2012-12-12

    Applicant: Borealis AG

    Inventor： Pauli Leskinen ,  Sameli Hakola ,  Kauno Alastalo ,  Klaus Nyfors

    IPC: C08F110/06 ,  B01J19/24 ,  B01J19/00

    CPC classification number: C08F110/06 ,  B01J19/0033 ,  B01J19/0053 ,  B01J19/2435 ,  B01J19/245 ,  B01J19/2455 ,  B01J2219/0004 ,  B01J2219/00049 ,  C08F10/00 ,  C08F210/06 ,  C08F2/14 ,  C08F2500/12 ,  C08F210/16

    Abstract: Method for preparing olefin polymer in a loop reactor, said loop reactor comprises a first outlet for withdrawing polymer slurry from the loop reactor, and a second outlet for withdrawing a polymer slurry from the loop reactor, wherein the first outlet is located such that polymer slurry is withdrawn having a concentration of polymer which is equal or higher than the average concentration of polymer in the loop reactor, and the second outlet is located such that polymer slurry is withdrawn having a concentration of polymer which is lower than the average concentration of polymer in the loop reactor, the method comprises the steps of supplying olefin monomers and a catalytic system to the loop reactor to form a polymer slurry in the loop reactor, and controlling the total amount of polymer and/or the total amount of polymer slurry withdrawn from the loop reactor by adjusting the ratio of polymer slurry withdrawn through the first outlet and polymer slurry withdrawn through the second outlet.

    Abstract translation: 在环管反应器中制备烯烃聚合物的方法，所述环管反应器包括用于从环管反应器中抽出聚合物浆料的第一出口和用于从环管反应器中抽出聚合物浆料的第二出口，其中第一出口定位成使得聚合物浆料 被取出，其聚合物的浓度等于或高于环管反应器中的聚合物的平均浓度，并且第二出口被定位成使得聚合物浆料被取出，其聚合物的浓度低于聚合物的平均浓度 环路反应器，该方法包括以下步骤：将烯烃单体和催化体系供应到环管反应器中以在环管反应器中形成聚合物浆料，并控制聚合物浆料的总量和/或从 通过调节通过第一出口排出的聚合物浆料与通过第二个出口排出的聚合物浆料的比例 小馅饼

    Process for producing alpha-olefin polymers in a multistage polymerization process
    17.
    发明申请
    Process for producing alpha-olefin polymers in a multistage polymerization process 有权

    公开(公告)号：US20230063000A1

    公开(公告)日：2023-03-02

    申请号：US17790600

    申请日：2021-02-23

    Applicant: Borealis AG

    Inventor： Pauli Leskinen ,  Erno Elovainio ,  Jouni Kivelä ,  Klaus Nyfors

    IPC: C08F110/06 ,  C08F2/00 ,  C08F2/01 ,  C08F2/34 ,  C08L23/16

    Abstract: The present invention relates to a process for producing alpha-olefin polymers in a multistage polymerization process which includes at least two gas phase polymerization reactors, wherein unreacted gas withdrawn from the second gas phase polymerization reactor is compressed in a compressor and said compressed gas is fed via a conveying gas line into an outlet between a first outlet vessel downstream of the first gas phase polymerization reactor and said second gas phase polymerisation reactor. Such a process can alleviate problems of malfunction, disturbances or plugging of the transfer lines and enables higher productivity and considerable saving of energy and equipment cost. Moreover, the production of alpha-olefin polymers with varying and tailored properties is possible.

    PROCESS AND APPARATUS FOR REMOVING POLYMER MATERIAL FROM A GAS-SOLIDS OLEFIN POLYMERIZATION REACTOR
    19.
    发明申请
    PROCESS AND APPARATUS FOR REMOVING POLYMER MATERIAL FROM A GAS-SOLIDS OLEFIN POLYMERIZATION REACTOR 有权

    公开(公告)号：US20210094008A1

    公开(公告)日：2021-04-01

    申请号：US16499361

    申请日：2018-05-30

    Applicant: Borealis AG

    Inventor： Klaus Nyfors ,  Erno Elovainio ,  Vasileios Kanellopoulos ,  Gunter Weickert ,  Eric-Jan Prinsen

    IPC: B01J8/00 ,  C08F10/00 ,  B01J8/18 ,  B01J8/38

    Abstract: The present invention relates to a process for removing polymer material from a gas-solids olefm polymerization reactor wherein the gas-solids olefm polymerization reactor is connected to the top part of an outlet vessel via a feed pipe wherein the powder surface of discharged polymer material and the barrier gas injection point are situated in the outlet vessel as such to fulfill the following criteria: R′=X/Y≤2.0; and R″=X/D≥1.0; wherein X=Distance between the powder surface and the barrier gas injection point; Y=Distance between the barrier gas injection point and the vessel outlet; and D=Equivalent outlet vessel diameter, an apparatus for continuously removing polymer material comprising a gas-solids olefm polymerization reactor, an outlet vessel and a feed pipe connecting the gas-solids olefm polymerization reactor with the top part of the outlet vessel and the use of said apparatus for polymerizing alpha-olefm homo- or copolymers having alpha-olefin monomer units of from 2 to 12 carbon atoms and for increasing the barrier gas efficiency of the gas-solids olefin reactor to at least 75%.

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