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. 24, 1987
Filed:
Aug. 13, 1986
Applicant:
Inventors:
Hiroshi Sato, Osaka, JP;
Kenichi Hirose, Osaka, JP;
Norio Ishii, Ehime, JP;
Youichi Umada, Osaka, JP;
Assignee:
Sumitomo Chemical Company, Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
540536 ; 540535 ;
Abstract
.epsilon.-caprolactam is prepared by gas phase catalytic synthesis in which cyclohexanone oxime is brought into contact with crystalline alluminosilicate, for example, ZSM-5 H.sup.+ form) having 1-12 of constraint index, 500 or more, preferably 1000 or more, of Si/Al atomic ratio and 5.mu. equivalent/g or less, preferably 2.mu. equivalent/g, of external acid amount.