METHOD OF PURIFICATION OF N-ALKYLDINITROANILINES FROM N-NITROSOANILINES

摘要

FIELD: synthesis of nitroamines. SUBSTANCE: process is carried out by thermic treatment of technical product in dichloroethane at 140-190 C under pressure 2-15 atm (preferably at 160-170 C and 4-10 atm). N-Nitrosoaniline containing in the technical product is subjected for denitrosation and its quantity is decreased from 7.1 to 0.02% at temperature from 140 to 190 C and under pressure 5 atm. Use of hydrochloric and sulfamide acid and formation of sewage in large quantity were eliminated. EFFECT: simplified process. 2 cl, 2 tbl