Method for producing acetoacetic acid arylamides
AssigneeLon za AG
InventorsErich Armbruster, Thuy Quach, Günther Rosenthal, Brian Schwegler
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Abstract
Acetoacetic acid arylamides are continuously produced from diketene and primary or secondary aromatic amines under the conditions of a reactive distillation in the presence of water. The continuous method provides a high purity of the products, nearly quantitative yields and a high rate of throughput.
Claims18
A continuous process comprising continuously manufacturing an arylamide of acetoacetic acid from diketene and a primary or secondary aromatic amine, the reaction of the diketene with the aromatic amine is conducted in the presence of water in the manner of a reactive distillation.
A continuous process comprising continuously manufacturing an arylamide of acetoacetic acid from diketene and a primary or secondary aromatic amine, the reaction of the diketene with the aromatic amine is conducted in the presence of water in the manner of a reactive distillation, where the chemical reaction in liquid phase and a thermal mass transfer between the liquid phase and a countercurrent vapor phase take place simultaneously.
Dependencies are inferred from the claim text.