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US 2003/0165422 A1Published application
Process for the production of hydrogen peroxide
AssigneeDegussa AG
InventorBernhard Maurer
Life of this patent
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Abstract
The anthraquinone process for producing hydrogen peroxide, including a hydrogenation step, an oxidation step and an extraction step. The oxidation waste gas leaving the oxidation reactor at an excess pressure is passed as a propellant jet to one or more gas jets and whereby a vacuum is produced for auxiliary processes, such as drying of the working solution, distillation of the aqueous hydrogen peroxide solution and drawing off of ventilator gases from solvent storage tanks.
Claims18
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 Pi 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 Pa which is less than Pi but greater than atmospheric pressure P0, 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.
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Dependencies are inferred from the claim text.