PROCESS FOR MAKING ETHYLENE HOMOPOLYMERS
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United States of America Patent
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app pub date -
May 16, 2012
filing date -
Nov 21, 2008
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Abandoned
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Abstract
A process for making an ethylene homopolymer in the presence of an oxide-supported chromium catalyst is disclosed. A small amount of an α-olefin contacted with the catalyst before polymerizing ethylene or introduced into an ethylene homopolymerization unexpectedly boosts process productivity. When used at part per million levels, the α-olefin improves productivity while maintaining desirable polymer properties. The invention is particularly valuable for making HDPE resins useful for blow molding applications.
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