中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

74 records (took 0.018 seconds)

    MULTISTAGE PROCESS FOR THE POLYMERIZATION OF OLEFINS
    13.
    发明申请
    MULTISTAGE PROCESS FOR THE POLYMERIZATION OF OLEFINS 有权
    烯烃聚合的多种方法

    公开(公告)号：US20160108147A1

    公开(公告)日：2016-04-21

    申请号：US14889794

    申请日：2014-05-13

    Applicant: Basell Polyolefine GmbH

    Inventor： Giuseppe Penzo ,  Gabriele Mei ,  Gerhardus Meier ,  Ulf Schueller ,  Antonio Ciarrocchi

    IPC: C08F110/02 ,  B01J19/24

    CPC classification number: C08F110/02 ,  B01J8/0025 ,  B01J8/1863 ,  B01J8/1872 ,  B01J8/26 ,  B01J19/245 ,  B01J2208/00274 ,  B01J2208/00292 ,  B01J2208/00557 ,  B01J2208/00752 ,  B01J2208/00761 ,  B01J2208/00769 ,  B01J2208/00991 ,  B01J2219/24 ,  C08F10/00 ,  C08F2/001 ,  C08F2/34 ,  C08F2/01 ,  C08F2500/12 ,  C08F2500/07 ,  C08F2500/24 ,  C08F2500/18

    Abstract: A process for polymerizing olefins in at least two serially connected gas-phase polymerization reactors, the process for transferring polyolefin particles from a first gas-phase polymerization reactor to a second gas-phase polymerization reactor comprising the steps of: a) discharging polyolefin particles into a separation chamber being at a lower pressure than the pressure in the first reactor; b) transferring the polyolefin particles within the separation chamber into a lower part which contains a bed of polyolefin particles which moves from top to bottom of this part of the separation chamber and into which a fluid is introduced so that an upward fluid stream is induced, c) withdrawing polyolefin particles from the lower end and transferring them to one of at least two lock hoppers working intermittently in parallel; and d) simultaneously pressurizing another of the at least two lock hoppers working intermittently by means of a gas comprising reaction gas coming from the second reactor.

    Abstract translation: 一种在至少两个串联连接的气相聚合反应器中聚合烯烃的方法，将聚烯烃颗粒从第一气相聚合反应器转移到第二气相聚合反应器的方法，包括以下步骤：a）将聚烯烃颗粒排入 分离室的压力低于第一反应器中的压力; b）将分离室内的聚烯烃颗粒转移到下部，该下部包含聚烯烃颗粒床，该聚烯烃颗粒床从分离室的该部分的顶部移动到底部，并且引入流体以使得向上的流体流被引入， c）从下端取出聚烯烃颗粒并将它们转移到平行间歇工作的至少两个锁定料斗之一; 以及d）通过包含来自所述第二反应器的反应气体的气体同时对所述至少两个所述至少两个锁定料斗中的另一个进行加压。

    Process for start-up of a multizone circulating reactor
    17.
    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
    19.
    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.

Patent Agency Ranking