FIELD: chemistry.
SUBSTANCE: invention relates to a method of washing away ammonia nitrogen and/or ammonium nitrogen and/or urea nitrogen from spent gases rich in these nitrogen compounds, in ammonia or urea production apparatus. The method involves treating nitrogen compounds in a gas washer with hypochlorite-containing solutions to form an intermediate product which, under acidic or neutral reaction conditions, is converted to elementary nitrogen and a salt. Conversion of the nitrogen compounds to elementary and a salt takes place at pH ranging from 4 to 6.
EFFECT: method provides efficient washing of ammonia, urea and ammonia compounds from spent gas.
11 cl, 2 dwg, 1 ex
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