FIELD: gas treatment. SUBSTANCE: method of removing toxic impurities from nitrogen monoxide-containing gas consists in treating gas by alkali metal compound, oxygen content in gas being used such as to be equal to its stoichiometric quantity necessary to oxidize nitrogen monoxide into nitrogen dioxide and, as alkali metal compound, alkali metal pyrosulfite being utilized in quantity large enough to form alkali metal nitrite, alkali metal nitrate, and sulfur dioxide resulting from nitrogen monoxide-oxygen reaction. EFFECT: enhanced treatment efficiency. 8 cl, 2 dwg
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