FIELD: inorganic chemistry, more particularly preparation of catalyst used for removing carbon oxide from gas mixtures. SUBSTANCE: potassium permanganate solution is added to manganese sulfate solution under stirring. Manganese sulfate solution contains zinc ions in amount of 3-5 mg equiv/g. Final product is filtered and is treated with hydrochloric acid solution with concentration of 2-10 wt %, and washed. EFFECT: improved catalytic activity of manganese dioxide. 3 ex, 1 tbl
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