PROCESS FOR THE PREPARATION OF A MIXTURE OF EPSILON-CAPROLACTAM, 6-AMINOCAPROIC ACID AND 6-AMINOCAPROIC AMIDE

摘要

Process for the preparation of a mixture of ε-caprolactam, 6-aminocaproic acid and 6-aminocaproic amide by heating an aqueous mixture containing ammonia and oligomers of 6-aminocaproic acid and/or of 6-aminocaproic amide, the aqueous mixture containing 0.5-7 wt.% of equivalent ammonia (calculated as NH3) and the temperature lying between 280 °C and 330 °C, in which by 'equivalent ammonia' is meant free ammonia and ammonia present in the form of a terminal amide group of one of the compounds present in the aqueous mixture.