Patent ID: 6761815
Filing Date: 2004-07-13
Classification: C25B

Abstract:
A process for the production of hydrogen peroxide solution which comprises:providing an electrolytic cell partitioned by a membrane into an anode chamber housing an insoluble anode and a cathode chamber housing a gas diffusion cathode, said gas diffusion cathode partitioning said cathode chamber into a solution chamber and a gas chamber located on a side of the solution chamber opposite the anode chamber; supplying an anolyte having a halide ion concentration of not greater than 1 g/l to the anode chamber, a catholyte comprising seawater to the solution chamber, and an oxygen-containing gas to the gas chamber; passing electric current through the electrolytic cell to effect electrolysis and thereby generate hydrogen peroxide which dissolves in said catholyte; and recovering hydrogen peroxide solution from said solution chamber, said process further comprising withdrawing anolyte from the anode chamber, withdrawing catholyte from the solution chamber, and mixing anolyte withdrawn from the anode chamber and catholyte withdrawn from the solution chamber to thereby decompose effective chlorine generated by anodic oxidation of chloride ion in the anode chamber by reaction with hydrogen peroxide contained in the withdrawn catholyte.