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发明申请
US20080214388A1 Methods to prepare catalyst compositions comprising small silica support materials 有权
制备包含小二氧化硅载体材料的催化剂组合物的方法

Methods to prepare catalyst compositions comprising small silica support materials
摘要：
Methods are provided to prepare a catalyst system that includes at least one titanium compound, at least one magnesium compound, at least one electron donor compound, at least one activator compound, and at least one silica support material, the at least one silica support material having a median particle size in the range of from 20 to 50 microns with no more than 10% of the particles having a size less than 10 microns and no more than 10% of the particles having a size greater than 50 microns and average pore diameter of at least ≧220 angstroms.
摘要（中）：

提供方法以制备包括至少一种钛化合物，至少一种镁化合物，至少一种电子给体化合物，至少一种活化剂化合物和至少一种二氧化硅载体材料的催化剂体系，所述至少一种二氧化硅载体材料 中值粒度在20至50微米的范围内，不超过10％的具有小于10微米尺寸的颗粒和不超过10％的尺寸大于50微米的颗粒和平均孔径 至少> = 220埃。

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