| 摘要 |
PROCESS FOR THE PREPARATION OF £-CAPROLACTAM COMPRISING TREATING 6-AMINOCAPROIC ACID, 6-AMINOCAPROATE ESTER, 6-AMINOCAPROAMIDE, OLIGOMERS OR POLYMERS OF THESE COMPOUNDS OF MIXTURE COMPRISING AT LEAST TWO OF THESE COMPOUNDS IN A CYCLISATION REACTOR IN THE PRESENCE OF SUPERHEATED STEAM IN WHICH A GASEOUS PRODUCT STREAM COMPRISING £-CAPROLACTAM, LIGHTS AND HEAVIES IS OBTAINED, WHEREIN THE PRODUCT STREAM, AFTER CONDENSATION AND AT LEAST PARTIAL REMOVAL OF WATER AND LIGHTS, IS SPLIT INTO A £-CAPROLACTAM STREAM AND A HEAVIES STREAM CONTAINING HEAVIES AND £-CAPROLACTAM AND THE HEAVIES STREAM IS RECYCLED TO A CYCLISATION REACTOR.
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