| 摘要 |
<p>A process for preparing ε-caprolactam by bringing cyclohexanone oxime into contact with a solid acid catalyst under gas-phase reaction conditions to conduct the rearrangement of cyclohexanone oxime, characterized in that the solid acid catalyst is one obtained by firing a dry catalyst precursor comprising zeolite, crystalline clay minerals, and an inorganic oxide of a Group 4, 13, or 14 element of the periodic table which is different from the oxides contained in crystalline clay minerals in the form of crystalline structures and/or a compound capable of forming such an inorganic oxide through firing or in that the above rearrangement is conducted in the presence of a polyhydric alcohol derivative represented by the general formula: R?1- O- R2¿- OH (wherein R1 is C¿1-5? alkyl or phenyl; and R?2¿ is C¿2-5? alkylene).</p> |
