Heterogeneous metallocene catalyst
    1.
    发明授权
    Heterogeneous metallocene catalyst 有权
    异质金属茂催化剂

    公开(公告)号:US06235671B1

    公开(公告)日:2001-05-22

    申请号:US09292039

    申请日:1999-04-14

    Abstract: A heterogeneous catalyst for olefin polymerization is prepared by spray drying a mixture of a metallocene catalyst, a cocatalyst and a hydrotalcite. It Preferred hydrotalcites are magnesium-aluminum hydroxy carbonates. The catalysts are very active for ethylene polymerization. The hydrotalcite used in this invention are generally defined by the formula: (Mg1−x Alx(OH)2)n+An−x/n·m H2O wherein X is from 0 to 0.5, m is from 0 to 20 and An− is an anion having a charge of n. Preferred hydrotalcites are those in which the anion A is a carbonate and which have been dried of adsorbed water.

    Abstract translation: 通过喷雾干燥茂金属催化剂,助催化剂和水滑石的混合物来制备用于烯烃聚合的非均相催化剂。 优选的水滑石是羟基碳酸镁铝。 催化剂对于乙烯聚合是非常有活性的。 本发明中使用的水滑石通常由下式定义:其中X为0至0.5,m为0至20,An-为负电荷为n的阴离子。 优选的水滑石是阴离子A是碳酸盐并且已被吸附的水干燥的那些。

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