GAS-PHASE POLYMERIZATION OF ETHYLENE WITH A SILICA-SUPPORTED METALLOCENE CATALYST - INFLUENCE OF TEMPERATURE ON DEACTIVATION

Authors
ROOS P MEIER GB SAMSON JJC WEICKERT G WESTERTERP KR
Citation
P. Roos et al., GAS-PHASE POLYMERIZATION OF ETHYLENE WITH A SILICA-SUPPORTED METALLOCENE CATALYST - INFLUENCE OF TEMPERATURE ON DEACTIVATION, Macromolecular rapid communications, 18(4), 1997, pp. 319-324
Citations number
15
Categorie Soggetti
Polymer Sciences
Journal title
Macromolecular rapid communications → ACNP
ISSN journal
10221336
Volume
18
Issue
4
Year of publication
1997
Pages
319 - 324
Database
ISI
SICI code
1022-1336(1997)18:4<319:GPOEWA>2.0.ZU;2-O
Abstract
Ethylene was polymerized at 5 bar in a stirred powder bed reactor with silica supported rac-Me2Si[Ind](2)ZrCl2/methylaluminoxane (MAO) at te mperatures between 40 degrees C and 80 degrees C using NaCl as support bed and triethylaluminium (TEA) as a scavenger for impurities. For th is fixed recipe and a given charge of catalyst, the average catalyst a ctivity is reproducible within 10% for low temperatures. The polymeriz ation rate and the rate of deactivation increase with increasing tempe rature. The deactivation could be modeled using a first order dependen ce with respect to the polymerization rate.