C - Chemistry – Metallurgy – 08 – F
Patent
C - Chemistry, Metallurgy
08
F
402/614
C08F 10/06 (2006.01) B01J 19/00 (2006.01) C08F 2/00 (2006.01) C08F 4/60 (2006.01) C08F 110/06 (2006.01)
Patent
CA 1286839
ABSTRACT Disclosed herein is a process for continuously producing polypropylene at a constant production rate in the presence of a catalyst system composed of a transition metal catalyst and an organoaluminum compound. According to the present invention, the production rate of polypropylene, which is calculated based on the quantity of heat removed per unit time from a reaction tank operated at a constant tempera- ture, is controlled by varying the amount of the organoaluminum compound to be charged, when the weight ratio of the organoaluminum compound to the transition metal catalyst both retained in the reaction tank is not greater than a preset value. The production rate of polypropylene may also be controlled by varying the amount of the transition metal catalyst to be charged, when the weight ratio of the organoaluminum compound to the transition metal catalyst both retained in the reaction tank is greater than a preset value. Polypropylene of uniform quality can therefore be produced at the desired constant production rate.
523990
Asanuma Tadashi
Fujio Ichiro
Uchikawa Nobutaka
Asanuma Tadashi
Fujio Ichiro
Mitsui Toatsu Chemicals Inc.
Sim & Mcburney
Uchikawa Nobutaka
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