Method for producing polyetherpolyols

C - Chemistry – Metallurgy – 08 – G

Patent

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C08G 65/26 (2006.01)

Patent

CA 2401221

The invention relates to a method for producing polyetherpolyols by reacting diols or polyols with ethylene oxide, propylene oxide, butylene oxide or mixtures thereof in the presence of a multi-metal cyanide complex catalyst. The reaction is performed in stirred-tank reactor and the reaction mixture is circulated via an externally located heat exchanger, using a pump.

L'invention concerne un procédé de production de polyols de polyéther, selon lequel, dans un réacteur mélangeur, des diols ou des polyols sont mis à réagir avec de l'oxyde d'éthylène, de l'oxyde de propylène, de l'oxyde de butylène ou des mélanges de ceux-ci, en présence d'un catalyseur à complexe cyanuré à métaux multiples. L'invention est caractérisée en ce que le mélange de la réaction est mis en circulation par une pompe et par l'intermédiaire d'un échangeur thermique extérieur.

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