Method for producing polyetherpolyols in the presence of a...

C - Chemistry – Metallurgy – 08 – G

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C08G 65/26 (2006.01) B01J 19/18 (2006.01) B01J 27/26 (2006.01)

Patent

CA 2398276

The invention relates to a method for producing polyetherpolyols by reacting diols or polyols with ethylene oxide, propylene oxide or mixtures thereof in the presence of a multimetal cyanide complex catalyst. The reaction is performed in a vertical, high cylinder reactor with a central mixer-settler and heat exchanger plates through which heat exchanging agents flow. Said plates are arranged in the longitudinal direction of the reactor at an angle .alpha. of 0 - 70 ~ in the direction of rotation of said mixer-settler in relation to the radius of the reactor.

Procédé de préparation de polyétherpolyols pour mise en réaction de diols et de polyols avec de l'oxyde d'éthylène, de l'oxyde de propylène, de l'oxyde de butylène ou des mélanges de ces substances en présence d'un catalyseur multimétal-cyanure. Ladite mise en réaction est effectuée dans un réacteur vertical cylindrique haut doté d'un mélangeur central ainsi que de plaques échangeuses de chaleur parcourues par un fluide échangeur de chaleur qui sont placées essentiellement dans le sens longitudinal du réacteur, à un angle .alpha. allant de 0 à 70· dans le sens de rotation du mélangeur par rapport au rayon du réacteur.

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