Patent · US Expired

Method for producing &egr;-caprolactam and reactor for the method

US6531595B2 · kind B2 · utility

6Cited by

1References

8Claims

0Family size

Assignee

SUMITOMO CHEMICAL COMPANY, LIMITED · JP

Inventors

Wolfgang Holderich · Bischofswerda, DE
Gerd Dahlhoff · Bergheim, DE
Hiroshi Ichihashi
Keisuke Sugita · Tokyo, JP

Key dates

Filing date	Sep 27, 2001
Grant date	Mar 11, 2003
Priority date	—
Expiry date	Sep 27, 2021

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07D201/04
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

A method is provided for producing &egr;-caprolactam from cyclohexanone oxime by using a zeolite or non-zeolitic material as a catalyst under gas phase reaction conditions. The method comprises a reaction step converting cyclohexanone oxime into &egr;-caprolactam in the presence of the zeolite or non-zeolitic material; and a regeneration step of treating the zeolite or non-zeolitic material with a non-oxidizing gas at a temperature of from about 100°C. to about 600° C.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.