| abstract |
This process uses the auto-oxidation technique of an anthraquinone derivative, with its three successive stages of hydrogenation of the working solution (in 1), of oxidation of the hydrogenated working solution (in 2), and of 'extraction of hydrogen peroxide with water (in 3). The hydrogenation step is carried out so as to obtain, at the inlet of the oxidizer (2), a hydrogen peroxide equivalent of between 7 and 9 g / l approximately, and step (b) is carried out of oxidation at a temperature which, at the top of the oxidizer (2), is less than approximately 50 ° C., and preferably between 35 and 40 ° C. approximately. Application to the production of hydrogen peroxide on the site of a pulp bleaching plant. |