Gas phase polymerization and method of controlling same

C - Chemistry – Metallurgy – 08 – F

Patent

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C08F 10/00 (2006.01)

Patent

CA 2527615

A process for controlling a continuous gas phase exothermic process in a reactor comprising: (i) effecting a gas phase exothermic reaction under a set of operating conditions in the presence of a cooling agent, the cooling agent having a pre-selected concentration and feed rate of an induced cooling agent; (ii) determining a maximum production rate (I) without regard to limitations due to the cooling agent under the operating conditions; (iii) determining a maximum production rate (II) with regard to limitations due to the cooling agent under the operating conditions; (iv) calculating an optimal concentration of the induced cooling agent such that the difference between (I) and (II) is minimized; and (v) adjusting the feed rate of the induced cooling agent to achieve the concentration value calculated in (iv).

La présente invention concerne un procédé pour commander un processus continu exothermique en phase gazeuse dans un réacteur. Ce procédé consiste (i) à induire une réaction exothermique en phase gazeuse, dans des conditions de fonctionnement prédéfinies, en présence d'un agent de refroidissement dont la concentration et la vitesse d'alimentation sont prédéfinies, (ii) à déterminer une vitesse de production maximale (I), sans tenir compte de limites posées par l'agent de refroidissement dans lesdites conditions de fonctionnement, (iii) à déterminer une vitesse de production maximale (II), en tant compte de limites posées par l'agent de refroidissement dans lesdites conditions de fonctionnement, (iv) à calculer une concentration optimale de l'agent de refroidissement, de façon à minimiser la différence entre (I) et (II), puis (v) à régler la vitesse d'alimentation de l'agent de refroidissement, afin d'obtenir la concentration calculée en (iv).

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