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Silicoaluminates as “Support Activator” Systems in Olefin Polymerization Processes
Departamento de Química Inorgánica, Universidad de Alcalá, Campus Universitario, E-28871 Alcalá de Henares, Spain
Instituto de Catálisis y Petroleoquímica, CSIC, Cantoblanco, 28049 Madrid, Spain
Instituto de Ciencia de Materiales de Sevilla, Universidad de Sevilla, CSIC, 41092, Sevilla, Spain
* Author to whom correspondence should be addressed.
Received: 14 January 2010; in revised form: 27 January 2010 / Accepted: 1 February 2010 / Published: 3 February 2010
Abstract: In this work we report the polymerization behaviour of natural clays (montmorillonites, MMT) as activating supports. These materials have been modified by treatment with different aluminium compounds in order to obtain enriched aluminium clays and to modify the global Brönsted/Lewis acidity. As a consequence, the intrinsic structural properties of the starting materials have been changed. These changes were studied and these new materials used for ethylene polymerization using a zirconocene complex as catalyst. All the systems were shown to be active in ethylene polymerization. The catalyst activity and the dependence on acid strength and textural properties have been also studied. The behaviour of an artificial silica (SBA 15) modified with an aluminium compound to obtain a silicoaluminate has been studied, but no ethylene polymerization activity has been found yet.
Keywords: montmorillonite; SBA-15; ethylene; zirconium; acidity; polymerization
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Tabernero, V.; Camejo, C.; Terreros, P.; Alba, M.D.; Cuenca, T. Silicoaluminates as “Support Activator” Systems in Olefin Polymerization Processes. Materials 2010, 3, 1015-1030.
Tabernero V, Camejo C, Terreros P, Alba MD, Cuenca T. Silicoaluminates as “Support Activator” Systems in Olefin Polymerization Processes. Materials. 2010; 3(2):1015-1030.
Tabernero, Vanessa; Camejo, Claudimar; Terreros, Pilar; Alba, María Dolores; Cuenca, Tomás. 2010. "Silicoaluminates as “Support Activator” Systems in Olefin Polymerization Processes." Materials 3, no. 2: 1015-1030.