METHOD FOR PRODUCTION OF AQUEOUS ACIDIFIED SOLUTION CONTAINING CHLORATE IONS, METHOD FOR ELECTROCHEMICAL TREATMENT OF AQUEOUS SOLUTION OF MIXTURE OF SALTS OF ALKALI METALS, METHOD FOR PRODUCTION OF CHLORINE DIOXIDE Russian patent published in 1998 - IPC

FIELD: electromechanical treatment of alkali metals chlorates, sulfates and their mixtures with production of acidified solutions which may be used as initial material containing chlorate ions for the processes of production of chlorine dioxide or for some other purposes. SUBSTANCE: in order to produce aqueous acidified solution containing chlorate ions for production of chloride, aqueous solution is prepared which contains chlorate of alkali metal, sulfate of alkali metal with subsequent electromechanical oxidation of said solution in electrolyzer containing anode and cathode compartments separated by cation-exchange membrane with supply of initial solution to anode compartment, removal of a part of ions of alkali metal from solution through cation-exchange membrane to cathode compartment with production of solution containing sulfate of alkali metal, chlorate or alkali metal and chlorate ions, with subsequent removal of it from anode chamber and supply of produced solution in the course of formation of chlorine dioxide. EFFECT: higher efficiency. 64 cl, 4 dwg, 3 tbl