FIELD: production of inorganic substances. SUBSTANCE: reactor is supplied with acidic aqueous reaction medium containing alkali metal chlorate and sulfate, concentration of sulfate exceeding 3 mol/l but being below its saturation concentration. Chlorate ions are to chlorine dioxide, which is removed from reaction medium. The latter is withdrawn from reactor and fed into electrolyzer where acidity of medium is raised and concentration of alkali metal ions decreased. Acidified reaction medium is recycled into reactor. Additional alkali metal chlorate is added to reaction medium before or after electrolyzer. Process is virtually performed without sulfate or chlorate crystallization. EFFECT: enhanced efficiency of process. 8 cl, 2 dwg
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