Gas-phase alpha-olefin polymerization process in the...

Details Gas-phase alpha-olefin polymerization process in the... Gas-phase alpha-olefin polymerization process in the...

C - Chemistry, Metallurgy

08

F

402/614

C08F 2/38 (2006.01) C08F 10/00 (2006.01)

Patent

CA 1333440

A process for the continuous polymerization of one or more alpha-olefins with a transition metal catalyst, in a reactor having a fluidized and/or mechanically stirred bed, in which a very small amount of an activity retarder, generally less than 0.1 ppm, is introduced continuously into the reactor at a flow rate which is varied with time so as to keep substantially constant either the polymerization rate or the content of transition metal in the polymer produced. Suitable activity retarders include polymerization inhibitors such as, for example, oxygen, alcohols, carbon monoxide and carbon dioxide and electron donor compounds such as amides and ethers.

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