Supported olefin polymerization catalyst
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United States of America Patent
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Oct 28, 2008
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) an activator comprising (iii) an aluminoxane or (iv) a Group lilA metal or metalloid compound, 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 a source of a transition metal atom. The preferred transition metal compounds are metallocenes and the source of the transition metal atom is typically a ferrous or cupric metal salt. The supported catalyst systems show improved activity and also may reduce fouling in gas phase fluidised bed processes.
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