Colour number improvement in polyhydric alcohols by...

Details Colour number improvement in polyhydric alcohols by... Colour number improvement in polyhydric alcohols by...

C - Chemistry, Metallurgy

07

C

C07C 29/90 (2006.01) C07C 29/80 (2006.01) C07C 31/22 (2006.01)

Patent

CA 2395396

The invention relates to a method, whereby the colour number of polyhydric alcohols, in particular, trihydroxymethyl--propane, can be significantly improved by hydrogenation. The method is characterized in that an alcohol is used in the hydrogenation, which has been previously purified by distillation. The conventional catalysts for hydrogenation are used as catalysts, preferably copper, nickel, palladium or ruthenium.

L'invention concerne un procédé permettant d'améliorer considérablement l'indice de coloration d'alcools polyvalents, notamment de triméthylolpropane, par hydrogénation. Ce procédé est caractérisé en ce que l'on utilise, pour l'hydrogénation, un alcool purifié auparavant par distillation. Selon ce procédé, on fait appel aux catalyseurs utilisés habituellement pour les hydrogénations, de préférence à des catalyseurs à base de cuivre, nickel, palladium ou ruthénium.

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