Process for alpha-olefin gas-phase polymerization controlled...

Details Process for alpha-olefin gas-phase polymerization controlled... Process for alpha-olefin gas-phase polymerization controlled...

C - Chemistry, Metallurgy

08

F

402/616

C08F 2/34 (2006.01) C08F 2/40 (2006.01) C08F 10/00 (2006.01)

Patent

CA 2006083

A process for controlling the continuous gas-phase polymerisation of one or more alpha-olefins in a fluidized and/or mechanically stirred bed reactor using a high activity catalyst based on a transition metal of groups IV, V or VI of the Periodic Table comprises introducing into the reactor, continuously and simultaneously, an activity retarder and an activator, in very small amounts, in a molar ratio and at flow rates which are varied with time in order to maintain substantially constant either the polymerization rata or the transition metal content of the polymer produced.

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