Preparation of aqueous solutions of acetoacetamide

Details Preparation of aqueous solutions of acetoacetamide Preparation of aqueous solutions of acetoacetamide

C - Chemistry, Metallurgy

07

C

C07C 235/74 (2006.01) C07C 231/04 (2006.01)

Patent

CA 2093007

Disclosed is a process for the preparation of aqueous solutions of acetoacetamide wherein diketene and aqueous ammonia having an ammonia concentration of 6.0 to 9.0 weight percent are continuously fed to a reaction zone at rates which maintain in the reaction zone a pH of 7.0 to 8.2 and a residence time of 20 to 150 minutes while (i) maintaining the temperature of the reac- tion zone at 40 to 75 °C and (ii) subjecting the contents of the reaction zone to vigorous agitation. An aqueous product solution having an acetoacetamide concentration of 25 to 35 weight percent is continuously removed from the reaction zone.

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