FIELD: chemistry.
SUBSTANCE: invention relates to method of ecologically pure obtaining urea (CO(NH2)2) from wastes of any composition. Method includes the following stages: a) obtaining synthesis-gas, which contains CO, CO2 and H2, by high-temperature processing of wastes in reactor in presence of oxygen O2, obtained by the process of cryogenic air separation; b) conversion of CO, contained in synthesis-gas, with application of H2O, into CO2+H2 (shift reaction) and separation of CO2 from H2; c) conversion of H2, obtained at stage (b) with application of N2, obtained from the process of cryogenic air separation at stage (a), with obtaining ammonia (NH3), and d) conversion of NH3 from stage (c), with application of CO2 from stage (b) with obtaining urea (CO(NH2)2).
EFFECT: invention makes it possible to obtain urea by economical way without air-polluting gaseous emissions.
1 dwg
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