FIELD: chemistry.
SUBSTANCE: method of extracting NH3 from purge gases with the following composition, vol %: ammonia - 0.1 to 15, hydrogen - 20 to 55, other gases - the rest, involves washing purge gas in a scrubber and an ammonia extraction stage. Purge gases are washed in a multi-stage scrubber, while cooling ammonia solution between absorption stages, and ammonia is extracted after the first stage of the scrubber by evaporation in volume- or film-type apparatus at synthesis pressure or storage of ammonia in containers with subsequent drying and liquefaction.
EFFECT: improved economical and ecological characteristics of production.
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