METHOD OF PREPARING METALLOCENE CATALYSTS
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United States of America Patent
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Oct 10, 2013
app pub date -
Dec 14, 2011
filing date -
Dec 15, 2010
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Abstract
Methods of preparing silica-supported catalysts useful for olefin polymerization are described. The catalysts comprise a metallocene complex. An activator mixture made from a boron acid compound and methylalumoxane is combined with either: (i) the metallocenecomplex, followed by calcined or chemically treated silica to give a supported catalyst; or (ii) calcined or chemically treated silica, followed by the metallocenecomplex to give a supported catalyst. The methods provide active supported catalysts.
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