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:
Sep. 10, 2019
Filed:
Feb. 25, 2016
Mitsubishi Gas Chemical Company, Inc., Chiyoda-ku, JP;
Yuko Shimizu, Chiyoda-ku, JP;
Yoshiaki Yamamoto, Katsushika-ku, JP;
Mitsubishi Gas Chemical Company, Inc., Chiyoda-ku, JP;
Abstract
The present invention provides a method for isomerizing a cyclohexanediamine, which simply and highly actively realizes an isomerization reaction of a cyclohexanediamine, without passing through a high-pressure reaction and a complicated multi-stage process. The isomerization method has an isomerization step of isomerizing a cyclohexanediamine in the presence of a compound represented by the following formula (1) and at least one selected from the group consisting of an alkali metal, an alkali metal-containing compound, an alkaline earth metal or an alkaline earth metal-containing compound. wherein Rand Reach independently represent a hydrogen atom or a monovalent group selected from the group consisting of a substituted or unsubstituted hydrocarbon group, a substituted or unsubstituted alkoxy group, a substituted or unsubstituted aryloxy group and an acyl group (Rand Rmay mutually bind to form a ring); Rrepresents a hydrogen atom and an n-valent group selected from the group consisting of a substituted or unsubstituted hydrocarbon group; and n represents, an integer of 1 to 10.