METHOD AND APPARATUS FOR PRODUCING NH FROM MIXTURE CONTAINING NH AND ACIDIC GASES Russian patent published in 2013 - IPC C01C1/02 C01C1/10 C01C1/12 B01D19/00 

FIELD: chemistry.

SUBSTANCE: invention relates to a method and apparatus for producing ammonia from a mixture of ammonia, H₂S and/or CO₂-containing acidic gas and low-boiling water-soluble organic components. The method involves absorbing acidic gases in an acidic gas absorber with aqueous ammonia solution, wherein from the upper part of the acidic gas absorber, acidic gas-free ammonia is removed a considerable degree; a partial stream of the liquid phase from the acidic gas absorber is removed and treated so as to obtain NH₃ gas with low content of volatile organic compounds, which is fed back into the acidic gas absorber, wherein the partial stream from the acidic gas absorber is fed into a first stripping column, in which volatile components are removed in a considerable degree; the overhead product of the stripping column is partially condensed and remaining vapour is fed back into the acidic gas absorber.

EFFECT: invention includes a method and an apparatus for producing ammonia, in which high enrichment with an organic compound is prevented and an uninterrupted process is ensured.

14 cl, 1 ex, 1 tbl, 1 dwg