Complexing agent-modified trimetal cyanide catalyst

C - Chemistry – Metallurgy – 08 – G

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C08G 65/26 (2006.01) C08G 65/10 (2006.01)

Patent

CA 2407928

Metal [hexacyanocobaltate, cobalthexanitrite nitroferricyanide] complexes are useful alkylene oxide polymerization catalysts. The metal is any that forms a precipitate with the hexacyanocobaltate, cobalthexanitrite and nitroferricyanide groups. These catalysts are made from less expensive raw materials than the common zinc hexacyanocobaltate catalysts, and provide short induction periods and in many cases more controlled exotherms. In addition, the metal [hexacyanocobaltate, cobalthexanitrite nitroferricyanide] catalysts often provide poly(propylene oxide) polymers having very low unsaturations, even when the catalyst is complexed with a complexing agent such as glyme.

Des complexes métalliques d'hexacyanocobaltate, de cobalthexanitrite et de nitroferricyanide constituent des catalyseurs utiles de polymérisation de l'alkylène-oxyde. Ce métal est l'un des métaux qui forment un précipité avec les groupes d'hexacyanocobaltate, de cobalthexanitrite et de nitroferricyanide. Ces catalyseurs sont constitués à partir de matières premières moins chères que celles des catalyseurs d'hexacyanocobaltate de zinc traditionnels, ils produisent de courtes périodes d'induction et dans de nombreux cas sont plus régulés sur le plan exothermique. En outre, les catalyseurs métalliques d'hexacyanocobaltate, de cobalthexanitrite, et de nitroferricyanide génèrent souvent des polymères de poly(oxyde de propylène) dotés d'insaturations très faibles, même lorsque le catalyseur est complexé avec un agent complexant tel que l'éther diméthylique de l'éthylèneglycol.

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