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:
Jan. 20, 2026
Filed:
Sep. 24, 2020
Applicant:
Toray Industries, Inc., Tokyo, JP;
Inventors:
Daijiro Tsukamoto, Kanagawa, JP;
Kenji Kawamura, Kanagawa, JP;
Katsushige Yamada, Kanagawa, JP;
Masato Akahira, Aichi, JP;
Daisuke Yamamoto, Aichi, JP;
Assignee:
TORAY INDUSTRIES, INC., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C 51/09 (2006.01); B01J 23/44 (2006.01); C12P 7/44 (2006.01);
U.S. Cl.
CPC ...
C07C 51/09 (2013.01); B01J 23/44 (2013.01); C12P 7/44 (2013.01);
Abstract
The present invention relates to a method of producing adipic acid, including a step (hydrogenation step) of reacting 3-hydroxyadipic acid-3,6-lactone with hydrogen in an aqueous solvent in a presence of a hydrogenation catalyst. The hydrogenation catalyst preferably includes one kind or two or more kinds of transition metal elements selected from the group consisting of palladium, platinum, ruthenium, rhodium, rhenium, nickel, cobalt, iron, iridium, osmium, copper, and chromium.