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    Process for start-up of a multizone circulating reactor
    1.
    发明授权
    Process for start-up of a multizone circulating reactor 有权

    公开(公告)号：US10471407B2

    公开(公告)日：2019-11-12

    申请号：US15853072

    申请日：2017-12-22

    Applicant: Basell Polyolefine GmbH

    Inventor： Gabriele Mei ,  Massimo Covezzi ,  Gerhardus Meier ,  Antonio Mazzucco ,  Pietro Baita ,  Ulf Schueller ,  Lorella Marturano ,  Enrico Balestra

    IPC: B01J8/28 ,  B01J8/18 ,  C08F110/02 ,  C08F110/06

    Abstract: A process for starting a multizone circulating reactor containing no polyolefin particles, comprising the steps of conveying gas through the reactor and the gas recycle line, feeding a particulate material comprising a polymerization catalyst and optionally polyolefin into the reactor, controlling the gas flow in a vertical reactor zone equipped with a throttling valve at the bottom so that the upwards gas velocity in the bottom part of this reaction zone is lower than the terminal free-fall velocity of the particulate material fed into the reactor, and, after the weight of the particulate polyolefin in this reactor zone is higher than the drag force of the upward moving gas, controlling the circulation rate of the polymer particles within the multizone circulating reactor by adjusting the opening of the throttling valve and adjusting the flow rate of a dosing gas.

    OLEFIN POLYMERIZATION PROCESS IN A GAS-PHASE REACTOR HAVING THREE OR MORE POLYMERIZATION ZONES
    2.
    发明申请
    OLEFIN POLYMERIZATION PROCESS IN A GAS-PHASE REACTOR HAVING THREE OR MORE POLYMERIZATION ZONES 审中-公开

    公开(公告)号：US20190309107A1

    公开(公告)日：2019-10-10

    申请号：US16348612

    申请日：2017-11-09

    Applicant: Basell Polyolefine GmbH

    Inventor： Gerhardus Meier ,  Ulf Schueller

    IPC: C08F110/02

    Abstract: Process for preparing an olefin polymer including the step of polymerizing an olefin in the presence of a polymerization catalyst and hydrogen as molecular weight regulator in a gas-phase polymerization reactor to yield growing polymer particles, the reactor including three or more polymerization zones and at least two thereof are sub-zones of a polymerization unit wherein the growing polymer particles flow downward in a densified form and at least one polymerization zone has a ratio of hydrogen to the sum of olefins which is a factor of at least 1.5 lower than the ratio of hydrogen to the sum of olefins in the polymerization zone having the highest ratio of hydrogen to the sum of olefins and a factor of at least 1.5 higher than the ratio of hydrogen to the sum of olefins in the polymerization zone having the lowest ratio of hydrogen to the sum of olefins.

    PROCESS FOR THE GAS-PHASE POLYMERIZATION OF ETHYLENE OR ETHYLENE MIXTURES
    4.
    发明申请
    PROCESS FOR THE GAS-PHASE POLYMERIZATION OF ETHYLENE OR ETHYLENE MIXTURES 有权
    乙烯或乙烯混合物的气相聚合方法

    公开(公告)号：US20160108148A1

    公开(公告)日：2016-04-21

    申请号：US14891506

    申请日：2014-05-13

    Applicant: BASELL POLYOLEFINE GMBH

    Inventor： Gabriele Mei ,  Pietro Baita ,  Lorella Marturano ,  Antonio Mazzucco ,  Roberta Pica ,  Gerhardus Meier ,  Ulf Schueller

    IPC: C08F110/02

    CPC classification number: C08F110/02 ,  C08F2/001 ,  C08F2/002 ,  C08F4/654 ,  C08F4/6543 ,  C08F4/6548 ,  C08F4/655 ,  C08F4/6565 ,  C08F10/02 ,  C08F2/34 ,  C08F2500/18 ,  C08F2500/24 ,  C08F4/6492 ,  C08F4/6425

    Abstract: A process for the gas-phase polymerization of ethylene or a mixture of ethylene and one or more 1 olefins in the presence of a polymerization catalyst system comprising the steps a) feeding a solid catalyst component, which was obtained by contacting at least a magnesium compound and a titanium compound, to a continuously operated apparatus and contacting the solid catalyst component with an aluminum alkyl compound at a temperature of from 0° C. to 70° C. in a way that the mean residence time of the solid catalyst component in contact with the aluminum alkyl compound is from 5 to 300 minutes; b) transferring the catalyst component formed in step a) into another continuously operated apparatus and prepolymerizing it with ethylene or a mixture of ethylene and one or more 1 olefins in suspension at a temperature of from 10° C. to 80° forming polymer in an amount of from 0.2 to 25 g polymer/g of solid catalyst component in a way that the mean residence time of the solid catalyst component in the apparatus is from 5 minutes to 3 hours; and c) transferring the prepolymerized catalyst component formed in step b) into a gas-phase polymerization reactor and polymerizing ethylene or a mixture of ethylene and one or more 1 olefins in the presence of the prepolymerized catalyst component at temperatures of from 40° C. to 120° C. and pressures of from 0.1 to 10 MPa.

    Abstract translation: 一种在聚合催化剂体系存在下乙烯或乙烯与一种或多种烯烃的混合物进行气相聚合的方法，包括步骤a）进料固体催化剂组分，该固体催化剂组分是通过使至少一种镁化合物 和钛化合物连接到连续操作的装置上，并使固体催化剂组分与烷基铝化合物在0℃至70℃的温度下接触，使得固体催化剂组分的平均停留时间接触 烷基铝化合物为5至300分钟; b）将步骤a）中形成的催化剂组分转移到另一个连续操作的装置中，并将其与乙烯或乙烯和一种或多种1种烯烃在悬浮液中的混合物在10℃至80℃的温度下预聚合形成聚合物 以固体催化剂组分在设备中的平均停留时间为5分钟至3小时的方式，其量为0.2至25g聚合物/ g固体催化剂组分; 和c）将步骤b）中形成的预聚合的催化剂组分转移到气相聚合反应器中，并在预聚合的催化剂组分存在下在40℃的温度下聚合乙烯或乙烯和一种或多种烯烃的混合物 至120℃，压力为0.1至10MPa。

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