PRODUCTION METHOD FORε-CAPROLACTAM

摘要

A production method for epsilon-caprolactam, including: a step in which a gas-phase reaction is performed whereby a cyclohexanone oxime is caused to come in contact with a solid catalyst, and the cyclohexanone oxime is converted to epsilon-caprolactam, in the coexistence of a lower alcohol; and a step in which the volumes of water, ammonia, and amine coexisting in the gas-phase reaction system are adjusted to the values in formulas (1-3). The lower alcohol in the epsilon-caprolactam production method includes a recovered lower alcohol that is recovered from a reaction mixture obtained by the gas-phase reaction. (1) 0@{[ammonia (number of moles)/lower alcohol (number of moles)]×100}<14; (2) 0<{[water (number of moles)/lower alcohol (number of moles)]×100}<11; (3) 0@{[amine (number of moles)/lower alcohol (number of moles)]×100}<7.5