PROCESS FOR CONTINUOUSLY PRODUCING PROPYLENE HOMOPOLYMER OR A PROPYLENE COPOLYMER

摘要

Polypropylene of uniform quality is produced at a desired, constant production rate on a continuous basis in the presence of a catalyst system composed of a transition metal catalyst and an organoaluminum compound. The polypropylene production rate is calculated based on the quantity of heat removed per unit time from a reaction tank (1) operated at a constant temperature, and 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.