Isomerization method for diaminodicyclohexylmethane

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 R1 and R2 each 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 (R1 and R2 may mutually bind to form a ring); R3 represents 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.

Dependencies are inferred from the claim text.