Method for preparing an aqueous treatment solution containing at least hydrogen peroxide ions and hydroxyl ions in predetermined concentrations

摘要

The present invention provides a method for preparing an aqueous treatment solution containing at least hydrogen peroxide ions and hydroxyl ions in a predetermined concentration.PPThe method according to the invention consists of using an electrolytic cell comprising a porous cathode, and circulating simultaneously in contact with said porous cathode an oxygen-containing compressed gas and a weakly alkaline initial aqueous solution, so as to cause the formation of hydrogen peroxide ions and hydroxyl ions by reduction of the oxygen, said circulation being continued until said solution attains said predetermined concentration, said solution having attained said concentration then being discharged to the outside for use as the treatment solution in various applications.PPApplication in particular to bleaching, pollution control etc.