The aromatic nucleus or nuclei and also the alkyl and alkoxy radicals may optionally be substituted by halogen atoms, in particular fluorine atoms or other suitable inert or hydrogenable substituents. [0032] Preferably, the substituted aromatic amines are converted into cycloaliphatic amines having a low trans component. [0033] Preferably, in the process for preparing bis(p-aminocyclohexyl) methan