CAPROLACTAM PRODUCTION PROCESS Russian patent published in 2002 - IPC

FIELD: industrial organic synthesis. SUBSTANCE: caprolactam is prepared from derivatives of pentene acid isomers wherein -OH group is replaced by OR or SR group (R represents alkyl, cycloalkyl, arylalkyl, aryl, or sylyl). Pentene acid derivatives are subjected to aminomethylation using reaction with carbon monoxide, hydrogen, and ammonia at temperature between 60 and 230 C in presence of catalyst based on at least one metal selected from rhodium, ruthenium, iron, cobalt, iridium. Partial pressure of carbon monoxide is 2 to 200 bar, that of hydrogen 5 to 100 bar at 25 C. EFFECT: enabled single-stage process. 10 cl