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Received March 4, 2002
Accepted April 9, 2002
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Polymer-Supported Metallocene Catalysts for Gas-Phase Ethylene Polymerization
1Chemical Engineering Department, Queen’s University, Kingston, Ontario K7L3N6, Canada 2Dept. of Chem. Eng., University of Maryland- College Park, Canada
hsuc@chee.queensu.ca
Korean Journal of Chemical Engineering, July 2002, 19(4), 597-600(4), 10.1007/BF02699302
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Abstract
The use of hydroxylated chloromethylated-styrene/divinylbenzene copolymer as a support for three different catalysts, Cp2ZrCl2, [Ind]2ZrCl2 and (CH3)2Si[Ind]2ZrCl2 has been examined for the polymerization of ethylene in gas phase. The gas phase polymerization experiments were performed in a horizontal reactor by using Box-Behnken experimental design [Box and Wilson, 1951] to study the effects of temperature, ethylene partial pressure, and MAO cocatalyst level on polymerization. The measured average catalyst activities were empirically correlated with these_x000D_
three factors. Temperature appears to be the most important factor, which shows a first and second order effect on activity and also interacts with pressure and MAO. The kinetic study shows that these supported catalysts might contain two types of active sites, and the deactivation of sites follows a first order kinetic.
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