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Supported high activity polyolefin catalyst component with regular distribution of magnesium values provided utilizing a controlled drying protocol

机译:负载的高活性聚烯烃催化剂组分,镁值有规律地分布,利用可控的干燥方案提供

摘要

A new catalyst component useful in the polymerization of at least one olefin is disclosed. The catalyst component comprises the product obtained by contracting silica, in random order, with (1) at least one hydrocarbon soluble magnesium-containing compound; and (2) a first modifying compound selected from the group consisting of silicon halides, boron halides, aluminum halides and mixtures thereof followed by a second modifying compound selected from the group consisting of halides having the structural formula SiHrX2s, where X2 is halogen; r is an integer of 1 to 3; and s is an integer of 1 to 3 with the proviso that the sum of r and s is 4, a hydrogen halide and mixtures thereof. The product of this step is contacted with a titanium-containing compound having the structural formula TiX1p(OR1)q, where X1 is halogen; R1 is hydrocarbyl; p is an integer of 1 to 4; and q is 0 or an integer of 1 to 3, with the provisos that the sum of p and q is 4 and that a second titanium-containing compound having the structural formula Ti(OR)m Xn, where R is hydrocarbyl; X is halogen; m is an integer of 1 to 4; n is 0 or an integer of 1 to 3; and the sum of m and n is 4, is not utilized in the formation of said catalyst component. A catalyst system comprising the above catalyst component, an aluminum-containing first cocatalyst and at least one silane second cocatalyst is also set forth. Finally, a process for polymerizing at least one olefin utilizing the catalyst system of this disclosure is taught.
机译:公开了可用于至少一种烯烃的聚合的新催化剂组分。催化剂组分包括通过使二氧化硅与(1)至少一种可溶于烃的含镁化合物无规收缩而获得的产物; (2)选自由卤化硅,卤化硼,卤化铝及其混合物组成的组中的第一改性化合物,然后是选自具有结构式SiHrX2s的卤化物的第二改性化合物,其中X2为卤素; r是1至3的整数; s为1〜3的整数,条件是r与s之和为4,卤化氢及其混合物。该步骤的产物与结构式为TiX1p(OR1)q的含钛化合物接触,其中X1为卤素; R1是烃基; p为1〜4的整数。 q为0或1至3的整数,条件是p和q之和为4,并且第二种含钛化合物的结构式为Ti(OR)m Xn,其中R为烃基; X是卤素; m为1〜4的整数。 n为0或1至3的整数;并且m和n之和为4,不用于形成所述催化剂组分。还提出了包含上述催化剂组分,含铝的第一助催化剂和至少一种硅烷的第二助催化剂的催化剂体系。最后,教导了利用本公开的催化剂体系聚合至少一种烯烃的方法。

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