Patent ID: 6861042
Filing Date: 2005-03-01
Classification: B01J,C01B

Abstract:
1. A process for the production of hydrogen peroxide by the anthraquinone cyclic process, comprising a catalytic hydrogenation, an oxidation of the hydrogenated working solution with oxygen or an oxygen-containing gas, wherein hydrogen peroxide and substituted anthraquinone or mixture containing its ring-hydrogenated tetrahydro-anthraquinone is obtained and an extraction of the hydrogen peroxide from the mixture obtained after the oxidation, wherein the hydrogenation is performed by a continuous catalytic hydrogenation process and wherein said hydrogenation process comprises recirculating a substituted anthraquinone or a mixture of substituted anthraquinone and/or ring-hydrogenated tetradydro derivatives thereof in a reactor together with hydrogenation product, hydrogen and hydrogenation catalyst suspended in the reaction mixture, removing part of the hydrogenation product from the reactor, mixing the compound to be hydrogenated and the hydrogen together before entering the reactor and then feeding the substance to be hydrogenated and hydrogen into the reactor.