Supported olefin polymerization catalyst
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United States of America Patent
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Sep 25, 2007
Grant Date -
May 11, 2006
app pub date -
Dec 3, 2003
filing date -
Dec 17, 2002
priority date (Note) -
Expired
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Abstract
Supported catalyst systems are provided comprising (a) a transition metal compound, (b) a non aluminoxane activator comprising, and (c) a support material comprising an inorganic metal oxide, inorganic metal halide or polymeric material or mixtures thereof characterised in that the support material has been pretreated with an SO.sub.4 containing compound. The preferred transition metal compounds are metallocenes and the SO.sub.4 containing compound is typically sulphuric acid. The supported catalyst systems show improved activity and also may reduce fouling in gas phase fluidised bed processes.
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