| 摘要 |
<p>THE INVENTION RELATES TO A PROCESS FOR THE PREPARATION OF ( )-CAPROLACTAM FROM A MIXTURE COMPRISING 6-AMINOCAPROAMIDE AND/OR OLIGOMERS THEREOF, WHEREIN IN A FIRST STEP 6-AMINOCAPROAMIDE AND/OR OLIGOMERS THEREOF IS CONVERTED AT A TEMPERATURE OF BETWEEN 180 AND 250 INTO AMMONIA AND 6-AMINOCAPROIC ACID AND/OR OLIGOMERS THEREOF, WITH A SEPARATE OR SIMULTANEOUS REMOVAL OF THE AMMONIA, AND IN A SUBSEQUENT STEP THE 6-AMINOCAPROIC ACID AND/OR OLIGOMERS THEREOF ARE CONVERTED INTO CAPROLACTAM AT A TEMPERATURE OF BETWEEN 250 AND 400ºC.</p> |
