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Gas phase polymerization of ethylene with a silica-supported metallocene catalyst: influence of temperature on deactivation

✍ Scribed by Peter Roos; Gerben B. Meier; Job Jan C. Samson; Günter Weickert; K. Roel Westerterp

Publisher
John Wiley and Sons
Year
1997
Tongue
English
Weight
279 KB
Volume
18
Category
Article
ISSN
1022-1336

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✦ Synopsis

Abstract

Ethylene was polymerized at 5 bar in a stirred powder bed reactor with silica supported rac‐Me~2~Si[Ind]~2~ZrCl~2~/methylaluminoxane (MAO) at temperatures between 40°C and 80°C using NaCl as support bed and triethylaluminium (TEA) as a scavenger for impurities. For this fixed recipe and a given charge of catalyst. the average catalyst activity is reproducible within 10% for low temperatures. The polymerization rate and the rate of deactivation increase with increasing temperature. The deactivation could be modeled using a first order dependence with respect to the polymerization rate.

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