Method for producing dmc catalysts

B - Operations – Transporting – 01 – J

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B01J 27/26 (2006.01) C01C 3/11 (2006.01) C08G 65/10 (2006.01) C08G 65/26 (2006.01)

Patent

CA 2392819

The invention relates to an improved method of producing double-metal cyanide (DMC) catalysts for the production of polyether polyols by polyaddition of alkylene oxides to starter compounds containing active hydrogen atoms, in which the DMC catalyst dispersion is produced using a mixing nozzle, preferably a jet disperser. The DMC catalysts produced in this way have an increased activity in polyether polyol production, reduced particle size and narrower particle size distribution.

La présente invention concerne un procédé amélioré de production de catalyseurs de cyanure bimétallique (DMC), utilisés afin de produire des polyols de polyéther, par polyaddition d'oxydes d'alkylène sur des composés initiateurs présentant des atomes d'hydrogène actifs. Selon cette invention, la production de la dispersion de catalyseur DMC est réalisée par utilisation d'une buse de mélange, de préférence un dispositif de dispersion à jet. Les catalyseurs ainsi produits présentent, lors de la production de polyols de polyéther, une activité augmentée, une dimension particulaire réduite et une distribution des dimensions particulaires plus étroite.

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