Process for polymerizing monomers in fluidized beds

Details Process for polymerizing monomers in fluidized beds Process for polymerizing monomers in fluidized beds

C - Chemistry, Metallurgy

08

F

C08F 2/34 (2006.01) B01J 8/24 (2006.01) C08F 10/00 (2006.01) C08F 4/659 (2006.01) C08F 4/6592 (2006.01) C08F 110/02 (2006.01) C08F 210/14 (2006.01) C08F 210/16 (2006.01)

Patent

CA 2161419

The invention relates to methods for determining stable operating zones for gas fluidized bed polymerization and to a process for gas phase polymerization. In particular, a method of determining a stable operating zone of a gas fluidized bed polymerization reactor operating in condensed mode which comprises observing fluidized bulk density changes in the reactor associated with changes in the composition of the fluidizing medium; and increasing the cooling capacity of the recycle stream by changing the composition without exceeding the level at which a reduction in the fluidized bulk density becomes irreversible.

L'invention porte sur des procédés permettant de déterminer des zones stables de fonctionnement pour la polymérisation en lit fluidisé gazeux, sur un procédé de polymérisation en phase gazeuse et, plus particulièrement, sur un procédé de détermination d'une zne stable de fonctionnement dans un réacteur de polymérisation par lit fluidisé gazeux fonctionnant en mode condensé et consistant à observer dans le réacteur les changements de masse volumique fluidisée associés à des changements de composition dans le fluidisant, à augmenter la capacité de refroidissement du courant de recyclage en modifiant la composition sans dépasser le niveau à partir duquel une réduction de la masse volumique fluidisée devient irréversible.

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