PROCESSES FOR TRANSITIONING BETWEEN DIFFERENT POLYMERIZATION CATALYSTS IN A POLYMERIZATION REACTOR

Processes for transitioning from a first catalyst to a second catalyst in a gas phase polymerization reactor. In some embodiments, the processes relate to transitioning from a metallocene catalyst to a Ziegler-Natta catalyst. In other embodiments, the processes relate to transitioning from a first Z...

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Bibliographische Detailangaben
Hauptverfasser:	SINGH, Diwaker, BOLLER, Timothy, CORONA, Gerardo, LAMBERTI, William, PANNELL, Richard, HARLAN, Charles, JIANG, Yan, RAJPUT, Sateesh, KUO, Chi-i, EHRMAN, Fred
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	CHEMISTRY COMPOSITIONS BASED THEREON MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-UP
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Zusammenfassung:	Processes for transitioning from a first catalyst to a second catalyst in a gas phase polymerization reactor. In some embodiments, the processes relate to transitioning from a metallocene catalyst to a Ziegler-Natta catalyst. In other embodiments, the processes relate to transitioning from a first Ziegler-Natta catalyst to a second Ziegler-Natta catalyst. L'invention concerne des procédés de transition d'un premier catalyseur à un second catalyseur dans un réacteur de polymérisation en phase gazeuse. Dans certains modes de réalisation, les procédés concernent la transition d'un catalyseur métallocène à un catalyseur Ziegler-Natta. Dans d'autres modes de réalisation, les procédés concernent la transition d'un premier catalyseur Ziegler-Natta à un second catalyseur Ziegler-Natta.