Process for the preparation of 2,2-dimethylpropane-1,3-diol

Details Process for the preparation of 2,2-dimethylpropane-1,3-diol Process for the preparation of 2,2-dimethylpropane-1,3-diol

C - Chemistry, Metallurgy

07

C

260/635.3

C07C 29/38 (2006.01) C07C 29/80 (2006.01) C07C 31/20 (2006.01) C07C 45/75 (2006.01)

Patent

CA 2032323

The invention relates to a process for the preparation of 2,2-dimethylpropane-1,3-diol by an addition reaction between isobutyraldehyde and formaldehyde in the presence of tertiary amines as the catalyst, hydrogenation of the reaction mixture and subsequent distillation. Before the distillation, formaldehyde is added to the hydrogenation product to remove troublesome basic impurities.

L'invention concerne un procédé pour la préparation de 2,2-diméthylpropane-1,3-diol par une réaction d'addition entre l'isobutyraldéhyde et le formaldéhyde en présence d'amines tertiaires comme catalyseur, par hydrogénation du mélange réactionnel et distillation subséquente. Avant la distillation, on ajoute du formaldéhyde au produit d'hydrogénation pour éliminer les impuretés basiques gênantes.

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