Title:
ε-カプロラクタムの製造方法
Document Type and Number:
Japanese Patent JP4661071
Kind Code:
B2
Abstract:
The invention provides a method for producing ε-caprolactam comprising: a reaction process which subjects cyclohexanone oxime to a Beckmann rearrangement reaction in the presence of a solid catalyst; and a catalyst regeneration process which regenerates the solid catalyst used in the reaction process by heat treatment under an atmosphere comprising an oxygen-containing gas, wherein the solid catalyst heat-treated in the catalyst regeneration process is used in the reaction process, the carbon contents in the solid catalyst in the reaction process and the catalyst regeneration process are maintained in a range of 0.5 to 2% by weight, and the nitrogen contents in the solid catalyst in the reaction process and the catalyst regeneration process are maintained in a range of 0.01 to 0.2% by weight.According to the invention, ε-caprolactam can be produced in a high production yield for a long period of time by enhancing persistence of the catalytic activity for producing ε-caprolactam.
Inventors:
Keisuke Sugita
Kitamura Masaru
Hoshino Masahiro
Kitamura Masaru
Hoshino Masahiro
Application Number:
JP2004098506A
Publication Date:
March 30, 2011
Filing Date:
March 30, 2004
Export Citation:
Assignee:
Sumitomo Chemical Co., Ltd.
International Classes:
C07D201/04; B01J29/90; C07D223/10; B01J38/12; C07B61/00
Domestic Patent References:
| JP2000229939A | ||||
| JP53035691A | ||||
| JP3207454A | ||||
| JP2003236394A | ||||
| JP5201966A | ||||
| JP5148223A | ||||
| JP6107627A |
Attorney, Agent or Firm:
Toru Nakayama