Patent ID: 6982072

Claim:
A process for the production of hydrogen peroxide by the anthraquinone process in a continuously operated production plant, comprising: (i) in a hydrogenation step, hydrogenating an organic working solution containing one or more anthraquinone derivatives in the presence of a heterogeneous catalyst, to form a hydrogenated working solution, (ii) in an oxidation step, oxidizing the hydrogenated working solution to form an oxidized working solution, with the formation of hydrogen peroxide, by introducing an oxygen-containing oxidizing gas, at an excess pressure P i of at least 1 bar into an oxidation reactor and contacting it with the working solution from step (i), withdrawing oxidation waste gas from the oxidation reactor and optionally purifying it in a waste-gas purification plant, and (iii) recovering the hydrogen peroxide from the oxidized working solution, wherein the oxidation waste gas has an excess pressure P a which is less than P i but greater than atmospheric pressure P 0 , and passing the oxidation waste gas as a flow of propellant gas to at least one gas jet and thereby producing a vacuum for auxiliary processes required in the anthraquinone process.