The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 06, 1990
Filed:
Jan. 23, 1990
Applicant:
Inventors:
Masaru Kitamura, Osaka, JP;
Hiroshi Ichihashi, Osaka, JP;
Gohfu Suzukamo, Osaka, JP;
Yasuo Nakamura, Osaka, JP;
Assignee:
Sumitomo Chemical Company, Limited, Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
540536 ;
Abstract
.epsilon.-caprolactam is produced by gas phase reaction of cyclohexanone oxime using a solid acid as a catalyst in the presence of a compound represented by the formula (I): R.sub.1 --O--R.sub.2 (wherein R.sub.1 represents a lower alkyl group which may be substituted with a fluorine atom and R.sub.2 represents a hydrogen atom, a lower alkyl group or a phenyl group) such as a lower alcohol or an ether compound. The solid acid includes a crystalline metallosilicate or a crystalline silicate.