Transition metal superoxides
    2.
    发明授权
    Transition metal superoxides 有权
    过渡金属超氧化物

    公开(公告)号:US06765076B2

    公开(公告)日:2004-07-20

    申请号:US10102542

    申请日:2002-03-20

    IPC分类号: C08F430

    CPC分类号: C08F4/18

    摘要: Transition metal superoxides of formula M(O2)n, where M is a transition metal and n is equal to the valence of M, may be used as initiators for free radical polymerization, optionally, under conditions of living polymerization, with or without chain transfer agents. Polymers produced have a narrow molecular weight distribution and low polydispersity indexes when chain transfer agents and/or molecular weight controlling agents are used.

    摘要翻译: 式M(O 2)n的过渡金属超氧化物,其中M是过渡金属,n等于M的化合价,可以用作自由基聚合的引发剂,任选地,在活性聚合条件下,有或没有链转移 代理商 当使用链转移剂和/或分子量控制剂时,生产的聚合物具有窄的分子量分布和低的多分散指数。

    Methods of preparing a polymerization catalyst
    9.
    发明授权
    Methods of preparing a polymerization catalyst 有权
    制备聚合催化剂的方法

    公开(公告)号:US08211988B2

    公开(公告)日:2012-07-03

    申请号:US12113061

    申请日:2008-04-30

    IPC分类号: C08F4/24

    摘要: A method comprising contacting a support with a chromium-containing compound and a tin-containing compound to produce a catalyst precursor, and activating the catalyst precursor in a temperature range of from about 400° C. to about 700° C. to produce a polymerization catalyst. A method comprising contacting a support with a chromium-containing compound and a tin-containing compound to produce a catalyst precursor, activating the catalyst precursor in a temperature range of from about 400° C. to about 700° C. to produce a polymerization catalyst, and contacting the polymerization catalyst with ethylene in a reaction zone under suitable reaction conditions to form polyethylene wherein the molecular weight distribution of the polyethylene is broadened.

    摘要翻译: 一种方法,包括使载体与含铬化合物和含锡化合物接触以产生催化剂前体,并在约400℃至约700℃的温度范围内活化催化剂前体以产生聚合 催化剂。 一种方法,包括使载体与含铬化合物和含锡化合物接触以产生催化剂前体,在约400℃至约700℃的温度范围内活化催化剂前体以产生聚合催化剂 ,并在合适的反应条件下在反应区中使聚合催化剂与乙烯接触以形成聚乙烯,其中聚乙烯的分子量分布变宽。