Process for the preparation of percarboxylic acid solutions

Details Process for the preparation of percarboxylic acid solutions Process for the preparation of percarboxylic acid solutions

C - Chemistry, Metallurgy

09

K

31/90, 260/506.2

C09K 3/00 (2006.01) C07C 409/24 (2006.01)

Patent

CA 1080465

PROCESS FOR THE PREPARATION OF PERCARBOXYLIC ACID SOLUTIONS ABSTRACT OF THE DISCLOSURE Process for continuous production on of substantially anhydrous solutions of perpropionic acid in benzene. Aqueous hydrogen peroxide is first reacted with propionic acid in the presence of acid catalyst to form perpropionic acid and water (1). The perpropionic acid is extracted with benzene (5), to provide a benzene phase containing the perpropionic acid (11) and an aqueous raffinate (7). The benzene phase is subjected to an extraction with water (12) involving at least 3 stages, to remove hydrogen peroxide, and the resulting benzene extract (15) is subjected to azeotropic distillation (16) to provide the anhydrous solution (17). The aqueous raffin- ate, which contains hydrogen peroxide, is distilled to remove water (8) and the resulting concentrate is recycled (2) for use in the reaction (1). -1-

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