| abstract |
The invention relates to a process for the preparation of diaminodicyclohexylmethanen(PACM) with a proportion of trans, trans-4,4'-diaminodicyclohexylmethanenfrom 17 to 24% by hydrogenation of diaminodiphenylmethanen(MDA) in the presence of a powdery, in particular ruthenium-containing catalyst,nwherein the hydrogenation in a continuously operated suspension reactornis carried out and sales of MDA at least 95%, basednon the amount of MDA used. Preference is in a cascadenseveral series-connected suspension reactors, for example onenStirred kettle cascade or a bubble column cascade. |