METHOD OF PURIFYING MOTHER WATERS OF SODIUM AZIDE SYNTHESIS

摘要

FIELD: chemistry.;SUBSTANCE: invention relates to methods of multi-stage processing of industrial and circulating mother waters from organic and nitrogen-containing pollutants of different origin and can be applied at factories of chemical industry, predominantly in technology of purifying mother water of synthesis of toxic and explosive compounds of substances, which contain hydrazine, azides and ethanol. Hydrazine oxidation is carried out by hydrogen peroxide in mother waters, with ethyl alcohol and sodium azide in form of volatile compound being blown by air from mother waters with the following oxidation of steam-air mixture on catalyst; oxidation of hydrazine with hydrogen peroxide is carried out at pH=10 and temperature t=60°C for 2 hours; conversion of sodium azide into volatile compound is carried out by acidifying of mother waters by sulphuric acid to pH=1.65; blowing of ethanol and nitrogen hydride from mother waters is carried out by acidification of mother waters with sulphuric acid to pH=1.65; flowing of ethyl alcohol and nitrogen hydride from mother waters by air is carried out at temperature t=60°C, oxidation of ethyl alcohol steam and nitrogen hydride is carried out by air oxygen on aluminium-copper-chrome catalyst at temperature t=300-350°C and W=10000 h^-1.;EFFECT: complex purification of mother waters, which contain hydrazine, sodium azide and ethyl alcohol with minimal expenditures for process realisation.;5 cl, 1 dwg, 1 ex