Preparation and Characterization of MCM-41 Supported Metallocene Catalysts for Olefin Polymerization

Preparation and Characterization of MCM-41 Supported Metallocene Catalysts for Olefin Polymerization

The effect of the structure and surface properties of support material on metallocene (zirconocene chloride) adsorption and catalyst activity in ethene polymerization was studied. Commercial Grace silica, mesoporous silicate, MCM-41, and aluminium-modified MCM-41 were used as supports. The highest a...

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Veröffentlicht in:Journal of catalysis 1999-11, Vol.188 (1), p.14-23
Hauptverfasser: Rahiala, Hanna, Beurroies, Isabelle, Eklund, Tom, Hakala, Kimmo, Gougeon, Regis, Trens, Philippe, Rosenholm, Jarl B.
Format: Artikel
Sprache:eng
Schlagworte:
Applied sciences
Exact sciences and technology
heterogeneous catalysis
MCM-41
mesoporous silicate
metallocene
olefin polymerization
Organic polymers
Physicochemistry of polymers
Polymerization
Preparation, kinetics, thermodynamics, mechanism and catalysts
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Zusammenfassung:The effect of the structure and surface properties of support material on metallocene (zirconocene chloride) adsorption and catalyst activity in ethene polymerization was studied. Commercial Grace silica, mesoporous silicate, MCM-41, and aluminium-modified MCM-41 were used as supports. The highest amount of zirconocene dichloride was adsorbed on Al-modified MCM-41 (Si/Al=32), providing the most reactive sites for attachment of the active component on the support surface. The 13C-CPMAS NMR studies proved that Cp2ZrCl2 is bound to the support surface. Also the highest activity in ethene polymerization was obtained using this support.
ISSN:0021-9517
1090-2694
DOI:10.1006/jcat.1999.2657