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