公开(公告)号：US3658810A

公开(公告)日：1972-04-25

申请号：US3658810D

申请日：1969-08-29

Applicant: TEIJIN LTD

Inventor： TANAKA IKUZO ,  UEHARA HIDEO ,  TANAKA MAKOTO

IPC: C07D201/08 ,  C07D41/06

CPC classification number: C07D201/08

Abstract: A PROCESS FOR THE PREPARATION OF E-CAPROLACTAM BY CONTACTING CONTINUOUSLY WITH STEAM E-AMINOCAPROIC ACID, E-CAPROAMIDE OR A MIXTURE OF THE TWO AT A TEMPERATURE OF 150-400*C., WHILE DISCHARGING THE STEAM FROM THE REACTION SYSTEM. IN THIS PROCESS A SUBSTANCE NON-VOLATILE AND ACIDIC UNDER REACTION CONDITIONS CAN BE PREFERABLY USED AS CATALYST. BY THIS PROCESS, E-CAPROLACTAM CAN BE PRODUCED WITH HIGH YIELD WITHOUT FORMATION OF AMMONIUM SULFATE.