Preactivation of catalysts

Details Preactivation of catalysts Preactivation of catalysts

C - Chemistry, Metallurgy

08

F

C08F 10/00 (2006.01) B01J 8/00 (2006.01) B01J 8/06 (2006.01) B01J 19/24 (2006.01) C08F 10/06 (2006.01)

Patent

CA 2424944

Catalysts for the polymerization of C2-C20-olefins are preactivated by a process in which the catalyst is first mixed with the respective monomer, then, if appropriate, the respective cocatalyst is added and the resulting mixture is subsequently subjected to preactivation in a tube reactor and the catalyst which has been preactivated in this way is finally introduced into the actual polymerization reactor, wherein the mixture of catalyst, any cocatalyst and monomer is passed through the tube reactor in turbulent plug flow at a Reynolds number of at least 2 300.

L'invention concerne un procédé de préactivation de catalyseurs aux fins de polymérisation d'oléfines C2-C20. Ce procédé consiste à mélanger le catalyseur avec le monomère concerné et éventuellement à ajouter le cocatalyseur puis à soumettre le mélange ainsi obtenu à une préactivation dans un réacteur tubulaire. Enfin, on introduit le catalyseur ainsi préactivé dans le réacteur de polymérisation à proprement dit. Le mélange composé du catalyseur, éventuellement du cocatalyseur et du monomère, est acheminé à travers le réacteur tubulaire sous la forme d'un écoulement à bouchons turbulent ayant un nombre de Reynolds de 2300 minimum.

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