Preparation of aqueous solutions of acetoacetamide

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

1990-10-22

1991-06-18

Hollrah, Glennon H.

Organic compounds -- part of the class 532-570 series

Organic compounds

Amino nitrogen containing

564 4, C07C23305

Patent

active

050251066

ABSTRACT:
Disclosed is a process for the preparation of aqueous solutions of acetoacetamide wherein diketene and aqueous ammonia having an ammonia concentration of about 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 about 7.0 to 8.2 and a residence time of about 20 to 150 minutes while (i) maintaining the temperature of the reaction zone at about 40.degree. to 75.degree. C. and (ii) subjecting the contents of the reaction zone to vigorous agitation. An aqueous product solution having an acetoacetamide concentration of about 25 to 35 weight percent is continuously removed from the reaction zone.

REFERENCES:
patent: 2152132 (1939-03-01), Boese
patent: 3694431 (1972-09-01), Fuchs et al.
patent: 4129596 (1978-12-01), Kunstle et al.
patent: 4571433 (1986-02-01), Kunstle et al.

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