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    Start-up polymerization process
    3.
    发明授权
    Start-up polymerization process 有权
    启动聚合过程

    公开(公告)号：US06265502B1

    公开(公告)日：2001-07-24

    申请号：US09593926

    申请日：2000-06-15

    申请人： Marc Herzog

    发明人： Marc Herzog

    IPC分类号： C08F200

    CPC分类号： B01J8/1809 ,  B01J8/0015 ,  B01J2208/00256 ,  B01J2208/00274 ,  B01J2208/00539 ,  B01J2208/00716 ,  C08F10/00 ,  C08F210/16 ,  Y10S526/901 ,  Y10S526/905 ,  C08F2/34 ,  C08F210/08

    摘要： The subject-matter of the present invention is thus a process for starting up a gas phase olefin polymerisation reaction carried out using a Ziegler-Natta type catalyst based on a transition metal in a fluidized-bed reactor, through which passes a reaction gas mixture comprising the olefin, an inert gas, hydrogen and optionally at least one comonomer and which operates under conditions of temperature and pressure which make it possible to start up the polymerization, characterized in that the partial pressure of the olefin and the rate of introduction of catalyst into the reactor are increased whilst maintaining the ratios of the partial pressures of the olefin to the hydrogen and to the optional comonomer or comonomers substantially constant.

    摘要翻译： 因此，本发明的主题是用于启动使用基于流化床反应器中的过渡金属的齐格勒 - 纳塔型催化剂进行的气相烯烃聚合反应的方法，通过该反应气体混合物包含 烯烃，惰性气体，氢气和任选的至少一种共聚单体，并且其在温度和压力的条件下操作，这使得可以启动聚合，其特征在于烯烃的分压和催化剂的引入速率 增加反应器，同时保持烯烃与氢气和任选的共聚单体或共聚单体的分压比例基本恒定。

    Start-up polymerization process
    5.
    发明授权
    Start-up polymerization process 有权
    启动聚合过程

    公开(公告)号：US06348635B1

    公开(公告)日：2002-02-19

    申请号：US09593966

    申请日：2000-06-15

    申请人： Marc Herzog

    发明人： Marc Herzog

    IPC分类号： C07C204

    CPC分类号： B01J8/1809 ,  B01J2208/00256 ,  B01J2208/00274 ,  B01J2208/00716 ,  C08F10/00 ,  C08F210/16 ,  Y10S526/901 ,  Y10S526/922 ,  Y10S585/951 ,  C08F2/34 ,  C08F4/24 ,  C08F210/08

    摘要： A process for starting up a reaction for the polymerization of an olefin in the gas phase carried out using a catalyst based on chromium oxide in a fluidized bed reactor through which moves a reaction gas mixture containing the olefin, wherein in the start-up of the reaction, the olefin is introduced into the reactor until the desired production of polymer is reached by means of a two-stage process, during the first stage of which the introduction of the olefin is carried out so as to maintain a constant partial pressure of olefin in the reactor and during the second stage, the introduction of olefin is regulated at a constant flow rate.

    摘要翻译： 在流化床反应器中使用基于氧化铬的催化剂在气相中引发烯烃聚合的反应的反应方法，通过该反应器移动含有烯烃的反应气体混合物，其中在启动 反应中，将烯烃引入反应器中，直到通过两阶段方法达到所需的聚合物生产，在其第一阶段期间进行烯烃的引入以保持烯烃的恒定分压 在反应器中，在第二阶段期间，以恒定的流量调节烯烃的引入。