Method for producing peroxycarboxylic acid solutions,...

Details Method for producing peroxycarboxylic acid solutions,... Method for producing peroxycarboxylic acid solutions,...

C - Chemistry, Metallurgy

07

C

C07C 409/00 (2006.01) B01J 27/16 (2006.01) B01J 31/04 (2006.01) C07C 409/24 (2006.01) C07C 409/26 (2006.01)

Patent

CA 2377243

The invention relates to a method for producing a peroxyacetic acid or peroxypropionic acid solution by reacting acetic acid or propionic acid with hydrogen peroxide in the presence of a polyphosphoric acid catalyst. The catalyst used in the inventive method is a water-free solution that is obtained by dissolving 0.1 to 99 % by weight, especially 1 to 35 % by weight (based on the solution) of a polyphosphoric acid in the carboxylic acid that is to be converted to the peroxycarboxylic acid. The catalyst solution is preferably produced using molten polyphosphoric acid on the site of production of the same.

Procédé de préparation d'une solution d'acide peroxyacétique ou d'acide peroxypropionique qui consiste à mettre en réaction de l'acide acétique ou de l'acide propionique avec du peroxyde d'hydrogène en présence d'un catalyseur à base d'acide polyphosphorique. Selon la présente invention, le catalyseur utilisé est une solution exempte d'eau obtenue par dissolution de 0,1 à 99 % en poids, en particulier de 1 à 35 % en poids (par rapport à la solution), d'acide polyphosphorique dans l'acide carboxylique à convertir en acide peroxycarboxylique. La préparation de la solution de catalyse est effectuée de préférence à l'aide d'acide polyphosphorique fondu sur le lieu même de production dudit acide.

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