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

1976-04-28

1978-05-16

Thomas, Jr., James O.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

203 98, 203 99, 423589, C07C17910, B01D 300

Patent

active

040898920

ABSTRACT:
Process for continuous production of substantially anhydrous solutions of percarboxylic acid in solvent. Aqueous hydrogen peroxide is first reacted with the corresponding carboxylic acid in the presence of acid catalyst to form percarboxylic acid and water (1). The percarboxylic acid is extracted with solvent (5), to provide a solvent phase containing the percarboxylic acid (11) and an aqueous raffinate (7). The solvent phase is subjected to distillation (12) to provide the anhydrous solution (13). In this distillation (12) the hydrogen peroxide remaining in the solvent phase produced in the extraction (5), is distilled off together with water and some solvent, and the hydrogen peroxide is recovered as an aqueous phase and recycled (14). The aqueous raffinate, which contains hydrogen peroxide, is distilled to remove water (8) and the resulting concentrate is recycled (2) for use in the reaction (1).

REFERENCES:
patent: 2741584 (1956-04-01), Holmes et al.
patent: 2814641 (1957-11-01), Phillips et al.
patent: 3043666 (1962-07-01), Siwinski
patent: 3247244 (1966-04-01), Blumbergs et al.
patent: 3284491 (1966-11-01), Korach et al.
patent: 3341297 (1967-09-01), MacLean

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