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64 条记录 (耗时 0.039 秒)

    Method of changing between incompatible polymerization catalysts in a gas-phase fluidized-bed reactor
    31.
    发明授权
    Method of changing between incompatible polymerization catalysts in a gas-phase fluidized-bed reactor 有权
    在气相流化床反应器中改变不相容的聚合催化剂的方法

    公开(公告)号：US07964677B2

    公开(公告)日：2011-06-21

    申请号：US12085079

    申请日：2006-11-10

    申请人： Shahram Mihan ,  Rainer Karer

    发明人： Shahram Mihan ,  Rainer Karer

    IPC分类号： C08F2/34 ,  C08F4/78

    CPC分类号： C08F10/00 ,  C08F210/16 ,  Y10S526/901 ,  C08F2/34 ,  C08F2/42 ,  C08F4/24 ,  C08F210/08 ,  C08F2500/12 ,  C08F2500/18 ,  C08F210/14

    摘要： Method of changing from a polymerization using a first catalyst to a polymerization using a second catalyst which is incompatible with the first catalyst in a gas-phase reactor, which comprises the steps a) stopping of the polymerization reaction using the first catalyst, b) flushing of the reactor under polymerization conditions with at least one deactivating agent comprising a volatile constituent and a nonvolatile constituent in a weight ratio of from 0.1 to 1000, c) introduction of the second catalyst into the reactor and d) continuation of the polymerization using the second catalyst.

    摘要翻译： 在使用第一催化剂的聚合中使用在气相反应器中与第一催化剂不相容的第二催化剂进行聚合的方法，其包括步骤a）使用第一催化剂停止聚合反应，b）冲洗 的反应器在至少一种包含挥发性组分和非挥发性组分的去活化剂的重量比为0.1至1000的反应器中，c）将第二催化剂引入反应器中，d）使用第二种方法继续聚合 催化剂。

    Preparation of polyolefins having high molecular weights in the presence of an organic transition metal compound in a gas-phase fluidized-bed reactor
    33.
    发明授权
    Preparation of polyolefins having high molecular weights in the presence of an organic transition metal compound in a gas-phase fluidized-bed reactor 有权
    在有机过渡金属化合物存在下，在气相流化床反应器中制备具有高分子量的聚烯烃

    公开(公告)号：US07834107B2

    公开(公告)日：2010-11-16

    申请号：US10551676

    申请日：2004-04-01

    申请人： Alexander Köppl ,  Rainer Karer ,  Ulrich Nieken

    发明人： Alexander Köppl ,  Rainer Karer ,  Ulrich Nieken

    IPC分类号： C08F2/00

    CPC分类号： C08F210/16 ,  Y10S526/901 ,  Y10S526/943 ,  C08F2/002 ,  C08F2/00 ,  C08F2/38 ,  C08F210/08 ,  C08F2500/12 ,  C08F2500/18

    摘要： Process for preparing polyolefins having high molecular weights in the presence of a catalyst comprising an organic transition metal compound in a gas-phase fluidized-bed reactor, where the polyolefins prepared have a melt flow rate at 2.16 kg and 190° C. in accordance with ISO 1133 of less than 4 g/10 min. According to the present invention, a start-up phase during which a polyolefin having an increased melt flow rate of above 4 g/10 min is produced for a transitional period is provided. In this way, trouble-free start-up of the reactor is ensured even in the case of polymer products having a high molecular weight and a melt flow rate below 4 g/10 min and even when using catalysts based on organic transition metal compounds, in particular metallocene catalysts.

    摘要翻译： 在气相流化床反应器中，在含有有机过渡金属化合物的催化剂存在下制备具有高分子量的聚烯烃的方法，其中制备的聚烯烃的熔体流动速率为2.16kg和190℃，根据 ISO 1133小于4 g / 10 min。 根据本发明，提供了一种启动阶段，其中在过渡时期内产生熔体流动速率增加至高于4g / 10min的聚烯烃。 这样即使在具有高分子量和低于4g / 10min的熔体流动速率的聚合物产物的情况下甚至在使用基于有机过渡金属化合物的催化剂时也能确保反应器的无故障启动， 特别是金属茂催化剂。

    Discontinuous metering of catalysts and process auxilliaries into a gas-phase fluidized-bed reactor
    38.
    发明授权
    Discontinuous metering of catalysts and process auxilliaries into a gas-phase fluidized-bed reactor 失效
    催化剂和工艺助剂不连续计量进入气相流化床反应器

    公开(公告)号：US07534341B2

    公开(公告)日：2009-05-19

    申请号：US10552853

    申请日：2004-04-15

    申请人： Rainer Karer ,  Kaspar Evertz ,  Peter Kölle ,  Hans-Jacob Feindt

    发明人： Rainer Karer ,  Kaspar Evertz ,  Peter Kölle ,  Hans-Jacob Feindt

    IPC分类号： C10G35/00 ,  C10G35/10

    CPC分类号： B01J4/002 ,  B01J4/007 ,  B01J4/02 ,  B01J8/0035 ,  B01J8/004 ,  B01J8/1872 ,  B01J2208/00752 ,  C08F10/00 ,  C08F110/02 ,  C08F210/16 ,  C08F2/00 ,  C08F2/01 ,  C08F2/34 ,  C08F2500/07 ,  C08F2500/12

    摘要： Method of metering at least one solid, particulate catalyst into a reactor containing a fluidized bed (11) of particles in an at least partly gaseous medium, in which the catalyst is metered discontinuously at prescribed time intervals into the fluidized bed (11) at at least one metering point (10). According to the present invention, a fluid stream is firstly introduced into the reactor (5) so that a region having a reduced particle density is formed in the fluidized bed (11) around the metering point (10) and the catalyst is subsequently metered into this region. As a result of the prior introduction of a fluid stream (“preblowing”) before the actual introduction of the catalyst, the catalyst can penetrate significantly deeper into the fluidized bed from the metering point due to the reduced particle density and is dispersed better.

    摘要翻译： 将至少一种固体颗粒催化剂计量到含有至少部分气体介质中的颗粒流化床（11）的反应器的方法，其中催化剂以规定的时间间隔不连续地计量加入流化床（11）中 至少一个计量点（10）。 根据本发明，首先将流体流引入反应器（5），使得在流化床（11）周围形成具有减小的颗粒密度的区域，并将催化剂随后计量加入 这个地区。 由于在实际引入催化剂之前先前引入流体物流（“预吹扫”），由于颗粒密度降低，催化剂可以从计量点深入到流化床中，并且分散得更好。

    Discontinuous metering of catalysts and process auxiliaries into a gas-phase fluidized-bed reactor
    39.
    发明申请
    Discontinuous metering of catalysts and process auxiliaries into a gas-phase fluidized-bed reactor 失效
    催化剂和工艺助剂不连续计量进入气相流化床反应器

    公开(公告)号：US20070037935A1

    公开(公告)日：2007-02-15

    申请号：US10552853

    申请日：2004-04-15

    申请人： Rainer Karer ,  Kaspar Evertz ,  Hans-Jacob Feindt

    发明人： Rainer Karer ,  Kaspar Evertz ,  Hans-Jacob Feindt

    IPC分类号： C08G85/00 ,  B32B27/04

    CPC分类号： B01J4/002 ,  B01J4/007 ,  B01J4/02 ,  B01J8/0035 ,  B01J8/004 ,  B01J8/1872 ,  B01J2208/00752 ,  C08F10/00 ,  C08F110/02 ,  C08F210/16 ,  C08F2/00 ,  C08F2/01 ,  C08F2/34 ,  C08F2500/07 ,  C08F2500/12

    摘要： Method of metering at least one solid, particulate catalyst into a reactor containing a fluidized bed (11) of particles in an at least partly gaseous medium, in which the catalyst is metered discontinuously at prescribed time intervals into the fluidized bed (11) at at least one metering point (10). According to the present invention, a fluid stream is firstly introduced into the reactor (5) so that a region having a reduced particle density is formed in the fluidized bed (11) around the metering point (10) and the catalyst is subsequently metered into this region. As a result of the prior introduction of a fluid stream (“preblowing”) before the actual introduction of the catalyst, the catalyst can penetrate significantly deeper into the fluidized bed from the metering point due to the reduced particle density and is dispersed better.

    摘要翻译： 将至少一种固体颗粒催化剂计量到含有至少部分气体介质中的颗粒流化床（11）的反应器的方法，其中催化剂以规定的时间间隔不连续地计量加入流化床（11）中 至少一个计量点（10）。 根据本发明，首先将流体流引入反应器（5），使得在流化床（11）周围形成具有减小的颗粒密度的区域，并将催化剂随后计量加入 这个地区。 由于在实际引入催化剂之前先前引入流体物流（“预吹扫”），由于颗粒密度降低，催化剂可以从计量点深入到流化床中，并且分散得更好。