Process for the gas phase polymerisation of olefin monomers

Details Process for the gas phase polymerisation of olefin monomers Process for the gas phase polymerisation of olefin monomers

C - Chemistry, Metallurgy

08

F

402/623

C08F 4/68 (2006.01) C08F 2/32 (2006.01) C08F 10/00 (2006.01) C08F 10/02 (2006.01)

Patent

CA 1305826

ABSTRACT A process for the gas phase polymerisation of olefin monomers, especially ethylene, using a supported catalyst and a promoter, is disclosed. The promoter is added to the catalyst before the polymerisation reaction, and the promoter utilised is a high-boiling halogenated hydrocarbon which is solid or liquid at ambient pressure and a temperature about 20-110°C and which is selected amoung (a) halogenated alkanes having 2-25 carbon atoms (b) halogenated cycloalkanes having 5-12 carbon atoms (c) halogenated alkene monomers having 2-25 car- bon atoms in monomeric or polymeric form, and (d) halogenated aryl methanes. The promoter can be used alone or in mixture with other promoter compounds. To achieve satisfactory activity of the polymerisation catalyst, a molar ratio between promoter and catalyst metal of from about 2:1 to about 20:1 suffices.

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