Patent ID: 6447743
Filing Date: 2002-09-10
Classification: B01J,C01B

Abstract:
Process for the preparation of an aqueous hydrogen peroxide solution directly from hydrogen and oxygen, which comprises:providing a stirred reactor containing an aqueous reaction medium, wherein the aqueous reaction medium comprises a catalyst in a dispersed state and has a lower part and an upper part; adding a mineral acid to the aqueous medium so that the aqueous medium becomes acidic; injecting hydrogen and oxygen, in the form of small bubbles, into the lower part of the aqueous reaction medium a hydrogen molar flow rate and an oxygen molar flow rate, wherein the ratio of the hydrogen molar flow rate to the oxygen molar flow rate is greater than 0.0416; and introducing oxygen into a continuous gas phase in the stirred reactor and/or into the upper part of the aqueous reaction medium in an amount such that the molar ratio of hydrogen to oxygen in the continuous gas phase is less than 0.0416.