Patent ID: 6712949
Filing Date: 2004-03-30
Classification: C02F,C25B

Abstract:
A method for the synthesis of hydrogen peroxide having a pH of 7 or less, which comprises:(i) passing a current through an aqueous electrolyte between an anode and cathode, said electrolyte having a pH of 7 or less, said cathode comprising a redox catalyst, said redox catalyst characterized as being suitable for reacting with oxygen when in a reduced state to form hydrogen peroxide and for reduction electrochemically when in an oxidized state, and (ii) substantially simultaneously oxidizing water at the anode to form protons while cathodically reducing the redox catalyst of the cathode in the presence of said protons while introducing a source of oxygen for reacting chemically with the reduced catalyst to form a solution of hydrogen peroxide at a current efficiency of at least 35 percent, and reducing the oxidized catalyst electrochemically for recycling.