Spray-dried polymerization catalyst and polymerization processes employing same
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United States of America Patent
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Jan 3, 2006
Grant Date -
Jan 15, 2004
app pub date -
Jul 15, 2002
filing date -
Jul 15, 2002
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Abstract
A spray-dried catalyst precursor composition and method of making a spray-dried catalyst precursor composition with an inert filler, magnesium, a transition metal, solvent, and one electron donor compound. The catalyst precursor composition is substantially free of other electron donor compounds, the molar ratio of the electron donor compound to magnesium is less than or equal to 1.9, and comprises spherical or substantially spherical particles having a particle size of from about 10 to about 200 μm. Catalysts made from the spray-dried catalyst precursors and polymerization methods using such catalysts are disclosed.
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