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:
May. 21, 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
An object of the present invention is to simply and highly actively realize an isomerization reaction of an industrially important compound, diaminodicyclohexylmethane, without passing through a complicated multi-stage process. A method for isomerizing a diaminodicyclohexylmethane, including an isomerization step of isomerizing the diaminodicyclohexylmethane in the presence of an imine compound represented by the following general formula (1) and at least one compound selected from the group consisting of an alkali metal, an alkali metal-containing compound, an alkaline earth metal and 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 or an n-valent group selected from the group consisting of substituted or unsubstituted hydrocarbon groups; and n represents an integer of 1 to 10.