6533b82efe1ef96bd1293b31

RESEARCH PRODUCT

Influence of Acidic Support in Metallocene Catalysts for Ethylene Polymerization

V.i Costa VayáMaría Luján FerreiraJ.h.z. Dos SantosDaniel E. DamianiPatricia Gabriela Belelli

subject

chemistry.chemical_elementPolyethyleneCatalysisCatalysislaw.inventionPreparation methodchemistry.chemical_compoundchemistryChemical engineeringAluminiumlawEthylene polymerizationPolymer chemistryCalcinationPhysical and Theoretical ChemistryZeoliteMetallocene

description

Abstract We studied a ZSM-5 zeolite as metallocene support for ethylene polymerization. We transformed the Na-ZSM-5 into H-ZSM-5. After the cation exchange, the zeolite was calcined at three different temperatures. Characterization of the material indicated that by means of the calcination procedure it is possible to produce dealuminization with an increase in extraframework aluminum (EFAL). We prepared zirconocene-supported catalysts on zeolitic supports using two preparation methods. The higher activity was observed with the zirconocene supported on ZSM-5 pretreated at 900°C. We think that the dealuminization process generates an increase in EFAL. This EFAL is responsible for the higher activity.

yearjournalcountryeditionlanguage
2001-11-01Journal of Catalysis
https://doi.org/10.1006/jcat.2001.3345