Olefin polymerization catalyst activity by olefin washing and readdition of electron donor
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United States of America Patent
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Sep 11, 1984
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N/A
app pub date -
Sep 9, 1983
filing date -
Sep 9, 1983
priority date (Note) -
Expired
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Abstract
A method is disclosed for increasing the productivity of an olefin polymerization catalyst. The catalyst contains an aluminum chloride co-crystallized titanium halide modified with an electron donor containing an ester group. The catalyst component is washed with an olefin and then electron donor is added back to the washed catalyst component, thereby greatly increasing its productivity without significantly adversely affecting the crystallinity of the polymer produced.
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