METHOD OF TREATMENT OF REACTION FLOW AT SEPARATION OF LACTAMS Russian patent published in 2002 - IPC

FIELD: treatment of lactams immediately after their synthesis in reaction flow formed due to hydrolysis and cyclization of aminonitriles, containing caprolactam, for example. SUBSTANCE: reaction flow escaping from reactor is cooled before fractionation for at least one hour to temperature not exceedi9ng 150 C in case of its distillation at absence of storage phase. Cooling is continued to temperature not above 50 C at availability of storage phase of reaction products before distillation, for at least one hour. It is good practice to have average stay period of lactam in distillation apparatus not exceeding one hour. EFFECT: possibility of treatment of reaction products under conditions excluding formation of oligomers. 10 cl