Heterogeneous chromium catalysts
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Publication date
2005-09-09
Authors
Bodart, P.
Nenu, N.C.
Weckhuysen, Bert
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Document Type
Patent
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Abstract
The present invention relates to a heterogeneous chromium catalyst system for the polymerisation of ethylene and/or alpha olefins prepared by the steps of: (a) providing a silica-containing support, (b) treating the silica-containing support with a chromium compound to form a chromium-based silica-containing support, (c) activating the chromium-based silica-containing support, (d) chemically reducing the activated chromium-based silica-containing support to produce a precursor catalyst, (e) reacting the reduced precursor catalyst with a tridentate ligand compound to obtain a catalyst and (f) optionally activating the catalyst issued from step (e) with a cocatalyst.
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Citation
Bodart, P, Nenu, N C & Weckhuysen, B M Sept. 09 2005, Heterogeneous chromium catalysts, Patent No. WO/2005/082815. < http://www.wipo.int/pctdb/en/wo.jsp?wo=2005082815&IA=EP2005050565&DISPLAY=STATUS >