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. 19, 2021
Filed:
Dec. 05, 2017
Toray Industries, Inc., Tokyo, JP;
Daijiro Tsukamoto, Kamakura, JP;
Masateru Ito, Kamakura, JP;
Katsushige Yamada, Kamakura, JP;
Masato Akahira, Nagoya, JP;
Daisuke Yamamoto, Nagoya, JP;
Koji Yamauchi, Nagoya, JP;
TORAY INDUSTRIES, INC., Tokyo, JP;
Abstract
A method produces ε-caprolactam through adipamide as an intermediate, and characteristically includes a lactamization step of reacting adipamide, formed from a material compound, with hydrogen and ammonia in the presence of a catalyst containing: a metal oxide mainly containing an oxide(s) of one or more metallic elements selected from the group consisting of metallic elements of group 5 and groups 7 to 14 in the 4th to 6th periods of the periodic table; and a metal and/or a metal compound having a hydrogenation ability.