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Supported high activity polyolefin catalyst component with regular distribution of magnesium values provided utilizing a controlled drying protocol
Supported high activity polyolefin catalyst component with regular distribution of magnesium values provided utilizing a controlled drying protocol
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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
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摘要
A novel catalyst support and a method for preparation thereof, characterized by the presence of selected amounts of a hydrocarbon soluble magnesium-containing compound applied to the support relative to solvent, wherein a surface uniformly and essentially continuously moistened with the solvated magnesium compound in a condition of incipient precipitation to permit the formation of a regular essentially continuous distribution of the magnesium compound onto and conforming to the support material. The drying process under these conditions is effective in maintaining to a high degree the effective surface area and pore volume of the material. The support containing the adsorbed magnesium is then dried in a controlled manner to essential incipient wetness conditions providing a regular spatial distribution of stacked reticular magnesium values at a level of one to five molecular monolayers on the support.PPA representative process for polymerizing or copolymerizing olefins providing stereospecific polymers such as propylene is disclosed.
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