Method for preparing metal cyanide catalysts using zero...

B - Operations – Transporting – 01 – J

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B01J 27/26 (2006.01) B01J 37/16 (2006.01) C08G 65/26 (2006.01)

Patent

CA 2479878

Metal cyanide catalyst dispersions in initiator compounds and/or polyether are prepared by reacting an acidic metal cyanide compound a zero valent metal in a medium that is a solvent for the acidic metal cyanide compound. The resulting catalyst slurry may be combined with an initiator and/or polyether and stripped to form a catalyst/initiator or catalyst/polyether slurry. Using this method, an active alkylene oxide polymerization catalyst is prepared, and the preparation method is greatly simplified. Further, it is not necessary to use a separate organic complexing agent in the preparation.

Le procédé selon l'invention consiste à préparer des dispersions de catalyseur à base de cyanure métallique dans des composés initiateurs et/ou du polyéther, en faisant réagir un composé cyanure métallique acide avec un métal de valence nulle dans une substance qui constitue un solvant pour le composé cyanure métallique acide. La pâte de catalyseur obtenue peut être combinée à un initiateur et/ou à du polyéther et subir une résorption pour former une pâte catalyseur/initiateur ou catalyseur/polyéther. Ledit procédé permet, de manière très simplifiée, de préparer un catalyseur de polymérisation d'oxydes d'alkylène actif. En outre, il n'est pas nécessaire d'utiliser un agent complexant organique séparé dans la préparation.

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