Verfahren zur Herstellung von Wasserstoffperoxid durch Direktsynthese

摘要

The invention relates to a method for producing an aqueous solution of hydrogen peroxide from hydrogen and oxygen by direct synthesis in the presence of a heterogeneous catalyst. According to this method, a mixture containing H2 and O2 is supplied to the reactor which contains the catalyst. Said gas mixture is essentially saturated or oversaturated (= containing mist) with water vapour. The volume ratio of gas mixture (Nl/h) supplied to liquid (l/h) taken off is adjusted to values equal to or greater than 15,000, especially 20,000 to 50,000 and the gas mixture leaving the reactor is re-stocked with H2, O2 and H2O vapour and recycled. According to the invention, solutions with a high concentration of H2O2 can be obtained without any further concentration.