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METHOD FOR REGENERATING CATALYST FOR PRODUCTION OF amp;epsi;- CAPROLACTAM, AND METHOD FOR PRODUCING amp;epsi;-CAPROLACTAM
METHOD FOR REGENERATING CATALYST FOR PRODUCTION OF amp;epsi;- CAPROLACTAM, AND METHOD FOR PRODUCING amp;epsi;-CAPROLACTAM
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机译:用于产生ε-己内酰胺的催化剂的再生方法和ε-己内酰胺的制备方法
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摘要
PROBLEM TO BE SOLVED: To obtain a regenerated catalyst having excellent activity from a catalyst whose activity has been lowered during use in the Beckmann rearrangement reaction of cyclohexanone oxime in the vapor phase.;SOLUTION: A solid catalyst whose activity has been lowered during use in the Beckmann rearrangement reaction of cyclohexanone oxime in the vapor phase is fired at 400-600°C for ≥1 hr after firing at 200-400°C for ≥1 hr in an atmosphere of an oxygen-containing gas. When such a regeneration process is periodically carried out, ε-caprolactam can be produced in a high yield over a long period of time.;COPYRIGHT: (C)2003,JPO
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