| 摘要 |
PURPOSE:To obtain the subject compound in high selectivity even in the case of high reaction ratio and in an improved life of catalyst by adding a lower alcohol to a reaction system and rearranging cyclohexanone oxime under a gaseous phase reaction condition by using a solid acid catalyst. CONSTITUTION:Cyclohexanone oxime is subjected to gaseous phase Beckmann rearrangement reaction in the presence of a lower alcohol, preferably methanol or ethanol by using a silicon oxide-containing catalyst, especially crystalline metallosilicate or crystalline silicate of pentasil type at 250 to 500 deg.C, preferably 300 to 400 deg.C reaction temperature at 0.1 to 40hr<-1>, preferably 0.5 to 10hr<-1> space velocity of raw material to give epsilon-caprolactam. The amount of the lower alcohol present in the reaction system is preferably 0.3 to 8 pts.wt. based on 1 pt.wt. cyclohexanone oxime. |
