Method for producing epsilon-caprolactam and method for reactivating catalyst for production of epsilon-caprolactam

摘要

A method for producing epsilon-caprolactam and a method for reactivating a zeolite catalyst for the production are provided. In the reactivation step, a zeolite catalyst is allowed to contact a gas containing a carboxylic acid, water and a compound selected from ammonia and amines. In accordance with the present invention, the catalytic activities of a zeolite catalyst used for the Beckmann rearrangement reaction of cyclohexanone oxime can be effectively restored. Consequently, epsilon-caprolactam may be produced with a high production yield for a long period of time by reusing the catalyst by the method described above.