Olefin polymerization process
    5.
    发明授权
    Olefin polymerization process 失效
    烯烃聚合工艺

    公开(公告)号:US06610799B1

    公开(公告)日:2003-08-26

    申请号:US09913529

    申请日:2001-10-24

    IPC分类号: C08F444

    摘要: A process for olefin polymerization in a reaction vessel, said process comprising polymerizing at least one &agr;-olefin in a polymerization stage employing a catalyst feed comprising 1) a first catalyst composition having at least two active catalytic sites capable of producing a first set of polymer components; 2) a second catalyst composition having at least two active catalytic sites capable of giving essentially the same set of polymer components as produced by the catalyst in feed (1) under the same polymerization conditions but these components in a different ratio to those produced by the catalyst composition of feed (1); wherein the amounts of catalyst compositions (1 and 2) fed into the reaction vessel are independently controlled.

    摘要翻译: 一种在反应容器中进行烯烃聚合的方法,所述方法包括使用催化剂进料在聚合阶段聚合至少一种α-烯烃,所述方法包括:1)具有至少两个活性催化部位的第一催化剂组合物,所述催化剂组合物能够产生第一组聚合物 组件; 2)具有至少两个活性催化部位的第二催化剂组合物,其能够在相同的聚合条件下能够提供基本上由进料(1)中的催化剂产生的相同组的聚合物组分,但这些组分以与由 饲料(1)的催化剂组成; 其中进料到反应容器中的催化剂组合物(1和2)的量是独立控制的。

    Multistep process for preparing polyolefins having high melt strength
    8.
    发明授权
    Multistep process for preparing polyolefins having high melt strength 失效
    制备具有高熔体强度的聚烯烃的多步法

    公开(公告)号:US06573343B1

    公开(公告)日:2003-06-03

    申请号:US09868253

    申请日:2001-06-15

    申请人: Arild Follestad

    发明人: Arild Follestad

    IPC分类号: C08F4642

    摘要: Olefin polymers are prepared in a plurality of polymerization stages, optionally in a plurality of polymerization reactors, in the presence of hydrogen and an olefin polymerization multisite catalyst, preferably a dualsite catalyst, having at least catalytic sites A and B, site A capable of yielding polymers of different molecular weights and differing MFR2 or MFR21 depending on the concentration of hydrogen in the polymerization reactor and site B capable of yielding polymers of certain molecular weight and MFR2 or MFR21 depending on the concentration of hydrogen in the polymerization reactor where the ratio between MFR2 or MFR21 of polymers produced by site B at two different selected hydrogen concentrations is less than ten and the ratio between MFR2 or MFR21 of polymers produced by site A at the same hydrogen concentrations is more than 50.

    摘要翻译: 烯烃聚合物在多个聚合阶段中,任选地在多个聚合反应器中,在氢气和烯烃聚合多位点催化剂,优选双重位点催化剂的存在下制备,其至少具有催化位点A和B,能够产生位点A 取决于聚合反应器中的氢浓度和能够产生某种分子量的聚合物的MFR B或MFR 21的聚合反应器中的氢浓度,取决于聚合反应器中的氢浓度,其中MFR 2 或由位点B在两种不同选择的氢浓度下生产的聚合物的MFR 21小于10,并且在相同氢气浓度下由位点A产生的聚合物的MFR 2或MFR 21之间的比率大于50。