Reducing scale in vinyl polymerizations
    5.
    发明授权
    Reducing scale in vinyl polymerizations 有权
    降低乙烯基聚合的规模

    公开(公告)号:US6001937A

    公开(公告)日:1999-12-14

    申请号:US193919

    申请日:1998-11-17

    IPC分类号: C08F2/00 C08F14/06

    CPC分类号: C08F2/004

    摘要: Disclosed is a method of inhibiting the formation of scale on reactor surfaces in contact with a polymerizing vinyl monomer. The reactor surfaces are contacted with a composition that contains, as a scale reducing agent, an acidic hydrazone condensate or a salt thereof. The scale reducing agent can be added to the polymerizing monomer or it can be placed in a composition containing a surfactant and an inorganic binder and the composition can be applied to the reactor surfaces or added to the monomer.

    摘要翻译: 公开了抑制与聚合乙烯基单体接触的反应器表面上的氧化皮的形成的方法。 将反应器表面与含有作为除垢剂的酸性腙缩合物或其盐的组合物接触。 减缩剂可以添加到聚合单体中,或者可以将其放置在含有表面活性剂和无机粘合剂的组合物中,并且可以将组合物施加到反应器表面或加入到单体中。

    Acyclic anionic six-electron-donor ancillary ligands
    7.
    发明授权
    Acyclic anionic six-electron-donor ancillary ligands 失效
    非环阴离子六电子给体辅助配体

    公开(公告)号:US06780807B2

    公开(公告)日:2004-08-24

    申请号:US10066983

    申请日:2002-02-04

    申请人: Sandor M. Nagy

    发明人: Sandor M. Nagy

    IPC分类号: B01J3100

    摘要: The present invention provides an improved acyclic anionic six-electron-donor ancillary ligand suitable for being bonded in a transition metal complex. The present invention also provides a transition metal complex that includes at least one acyclic anionic six-electron-donor ancillary ligand which is suitable for use as an olefin polymerization catalyst. The complex includes a Group 3 to 10 transition or lanthanide metal and one or more anionic or neutral ligands in an amount that satisfies the valency of the metal such that the complex has a net zero charge. The present invention also discloses a method for making transition metal complex and a method for using the complex for olefin polymerization.

    摘要翻译: 本发明提供了一种适于结合在过渡金属络合物中的改进的无环阴离子六电子给体辅助配体。 本发明还提供了一种过渡金属络合物,其包含至少一种适用于烯烃聚合催化剂的非环阴离子六电子给体辅助配体。 络合物包括第3至10族过渡金属或镧系元素金属和一种或多种以满足金属化合价的量的阴离子或中性配体,使得络合物具有净零电荷。 本发明还公开了一种制备过渡金属络合物的方法和使用该络合物进行烯烃聚合的方法。