Process for the production of hydrogen peroxide

C - Chemistry – Metallurgy – 01 – B

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C01B 15/023 (2006.01) B01J 23/96 (2006.01) B01J 35/02 (2006.01)

Patent

CA 2445815

The invention relates to a process for the production of hydrogen peroxide by the anthraquinone process, comprising a hydrogenation stage, an oxidation stage and an extraction stage. According to the invention, catalytic hydrogenation of anthraquinone derivatives dissolved in a working solution is carried out in the presence of added molecular oxygen. Per mol hydrogen, 0.1 to 10 mmol oxygen is preferably introduced into the hydrogenation stage with the hydrogenating gas, in mixture with an inert gas and/or dissolved and/or dispersed in the working solution. This increases the residence time of the catalyst.

La présente invention concerne un procédé de production de peroxyde d'hydrogène au moyen du processus anthraquinone, qui comprend une étape d'hydrogénation, une étape d'oxydation et une étape d'extraction. Selon la présente invention, l'hydrogénation catalytique de dérivés d'anthraquinone dissous dans une solution de travail, est effectuée en présence d'oxygène moléculaire ajouté. On introduit de préférence de 0,1 à 10 mmol d'oxygène par mole d'hydrogène dans l'étape d'hydrogénation avec le gaz hydrogénant, en mélange avec un gaz inerte et/ou en dissolution et/ou en dispersion dans la solution de travail. Ceci augmente le temps de séjour du catalyseur.

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