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:
Oct. 29, 2019
Filed:
Sep. 07, 2017
Applicant:
Sumitomo Chemical Company, Limited, Tokyo, JP;
Inventors:
Kazuaki Yoshimura, Niihama, JP;
Nobufumi Watanabe, Tsukuba, JP;
Kohei Seki, Ichihara, JP;
Masashi Teramori, Niihama, JP;
Keisuke Tanaka, Niihama, JP;
Assignee:
Sumitomo Chemical Company, Limited, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
C07D 201/04 (2006.01); C01B 39/36 (2006.01); B01J 29/40 (2006.01);
U.S. Cl.
CPC ...
C07D 201/04 (2013.01); B01J 29/40 (2013.01); C01B 39/36 (2013.01);
Abstract
A method for producing ε-caprolactam involves a step of Beckmann-rearranging cyclohexanone oxime in a gas phase in the presence of a zeolite catalyst containing silicon and at least one element selected from alkaline earth metal elements and magnesium. The concentration of the above-described element in the zeolite catalyst is 3 ppm by mass or more and 10000 ppm by mass or less.