method for reducing the level of nitrous fan in nitrous, gasformigen ausstromungen or gasstromen or exhaust gases

摘要

A process for reducing the level of nitrogen oxide contaminants in an industrial effluent gas comprises (a) oxidizing said gas to convert the contaminants substantially to a mixture of N2O3 and NO2 and (b) passing the oxidized gas through an aqueous medium containing an amount of hydrogen peroxide maintained at a level just sufficient to oxidize the N2O3 and NO2 to HNO3.