METHOD FOR PRODUCTION OF AMMONIUM NITRATE Russian patent published in 1995 - IPC

FIELD: chemical technology. SUBSTANCE: method involves neutralization of nitric acid by ammonia, evaporation thus prepared solution of ammonium nitrate till its concentration is 92-96 and additional evaporation to concentration 96-99.8 Mentioned above neutralization is carried out at 180-190 C and at elevated pressure. Said evaporation is carried out by heat of steam being isolated of boiling solution in neutralization zone. Additional evaporation initially takes place at 0.25-0.30 atm to concentration 98.0-98.5 The process is followed by additional evaporation at 0.7 atm till concentration is 99.8 EFFECT: improves efficiency of method. 3 cl, 2 dwg, 1 tbl