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:
Jul. 30, 2019
Filed:
Sep. 08, 2016
Applicant:
Toray Industries, Inc., Tokyo, JP;
Inventors:
Daijiro Tsukamoto, Kamakura, JP;
Masateru Ito, Kamakura, JP;
Katsushige Yamada, Kamakura, JP;
Kohei Yamashita, Nagoya, JP;
Masato Akahira, Nagoya, JP;
Koji Yamauchi, Nagoya, JP;
Assignee:
Toray Industries, Inc., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07D 201/08 (2006.01); B01J 23/44 (2006.01); C07D 223/10 (2006.01); C07C 59/245 (2006.01); B01J 21/04 (2006.01); B01J 21/06 (2006.01); B01J 21/08 (2006.01); B01J 21/18 (2006.01); B01J 23/20 (2006.01); B01J 23/26 (2006.01); B01J 23/42 (2006.01); B01J 23/46 (2006.01); B01J 23/72 (2006.01); C07B 61/00 (2006.01);
U.S. Cl.
CPC ...
C07D 201/08 (2013.01); B01J 21/04 (2013.01); B01J 21/063 (2013.01); B01J 21/066 (2013.01); B01J 21/08 (2013.01); B01J 21/18 (2013.01); B01J 23/20 (2013.01); B01J 23/26 (2013.01); B01J 23/42 (2013.01); B01J 23/44 (2013.01); B01J 23/464 (2013.01); B01J 23/466 (2013.01); B01J 23/468 (2013.01); B01J 23/72 (2013.01); C07C 59/245 (2013.01); C07D 223/10 (2013.01); C07B 61/00 (2013.01); Y02P 20/52 (2015.11);
Abstract
A method of producing ε-caprolactam from 3-oxoadipic acid includes: step 1 of mixing at least one selected from the group consisting of 3-oxoadipic acid and salts thereof with a catalyst and a solvent in the presence of hydrogen to produce 3-hydroxyadipic acid; and step 2 of reacting the 3-hydroxyadipic acid which is a product of step 1, a salt or carboxylic acid derivative thereof, or a mixture of these with hydrogen and ammonia.