PROCESS OF PREPARING SOLUTIONS OF ALKALI PEROXIDE AND PERCARBONATE

摘要

A process is described in which an aqueous alkaline solution of peroxide or percarbonate is prepared in an electrochemical cell, which comprises a porous oxygen diffusion cathode and a depolarized metal anode or hydrogen diffusion anode. In that process the cell is operated at a low external cell voltage, an electrolyte which contains alkali hydroxide and/or alkali carbonate is passed in said cell through the chamber disposed between the oxygen diffusion cathode and the anode, alkali peroxide and/or alkali percarbonate is formed by a reduction of oxygen at the cathode, and the H2O2/alkali molar ration is less than 4.