| abstract |
Production method of ε-caprolactam, comprising a Beckmann rearrangement step of the cyclohexanone oxime in a gas phase in the presence of a zeolite catalyst containing a silicon element and at least one element selected from the group consisting of a calcium element, a strontium element, a barium element, and a magnesium element, wherein the concentration of the at least one element selected from the group consisting of a calcium element, a strontium element, a barium element, and a magnesium element in the zeolite catalyst is 3 to 10,000 ppm by mass. |