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    • 6. 发明授权
    • Donor-modified olefin polymerization catalysts
    • 供体改性的烯烃聚合催化剂
    • US06228792B1
    • 2001-05-08
    • US09030615
    • 1998-02-27
    • Michael John Carney
    • Michael John Carney
    • B01J3118
    • C08F10/00C08F110/02C08F4/651C08F4/025C08F4/6555C08F2500/12C08F2500/18
    • Supported Ziegler-Natta catalyst component adapted for the polymerization of ethylene is provided. More specifically, certain organomagnesium compounds (e.g., dibutylmagnesium) which do not contain an oxygen linkage between the organo moiety and the magnesium are impregnated into a porous inorganic oxide support (e.g., agglomerated silica particles) to form a first reaction product. The first reaction product is halogenated, e.g., with HCl, to convert the organomagnesium derived component to MgCl2 thereby forming a second reaction product. The second reaction product is then treated with a transition metal compound (e.g., TiCl4), a particular type of electron donor (e.g., 2,6-dimethyl pyridine) and optionally at least one Group 2 or 13 organo metal compound (e.g., diethylaluminum chloride). The combination of the particular organomagnesium compounds and electron donor impart a low melt flow ratio and enhanced activity to resulting catalyst component.
    • 提供了适用于乙烯聚合的支持齐格勒 - 纳塔催化剂组分。 更具体地说,在有机部分和镁之间不含有氧键的某些有机镁化合物(例如二丁基镁)浸渍到多孔无机氧化物载体(例如附聚二氧化硅颗粒)中以形成第一反应产物。 第一反应产物被卤化,例如用HCl,将有机镁衍生的组分转化成MgCl 2,从而形成第二反应产物。 然后用过渡金属化合物(例如,TiCl 4),特定类型的电子给体(例如,2,6-二甲基吡啶)和任选的至少一种第2或13族有机金属化合物(例如二乙基铝 氯化物)。 特定的有机镁化合物和电子给体的组合给出了低的熔体流动比和增强的对所得催化剂组分的活性。