Method for producing alkyl ketene dimers

Details Method for producing alkyl ketene dimers Method for producing alkyl ketene dimers

C - Chemistry, Metallurgy

07

D

C07D 305/10 (2006.01) C07D 315/00 (2006.01)

Patent

CA 2466292

The invention relates to a method for producing alkyl ketene dimers by reacting carboxylic acid chlorides with tertiary amines in a molar ratio of between 1: 1 and 1: 1.6 at temperatures of between 65 and 150 ~C and with a residence time of between 1 and 30 mins in the absence of solvents. Said reaction partners are intensively mixed and the alkyl ketene dimers are separated from the reaction mixture.

Procédé de production de dimères d'alkylcétène par mise en réaction de chlorures d'acide carboxylique avec des amines tertiaires dans un rapport molaire de 1/1 à 1/1,6 à des températures de 65 à 150 ·C et avec un temps de séjour de 1 à 30 min., en l'absence de solvants. Ces substances sont soumises à un mélangeage intensif et les dimères d'alkylcétène sont séparés du mélange de réaction.

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