Hydrogenation of highly contaminated methylenedianiline

Details Hydrogenation of highly contaminated methylenedianiline Hydrogenation of highly contaminated methylenedianiline

C - Chemistry, Metallurgy

07

C

C07C 209/72 (2006.01) C07C 211/50 (2006.01)

Patent

CA 2507301

The invention relates to a process for the catalytic hydrogenation of impurity laden methylenedianiline feedstocks commonly referred to as MDA-50 and MDA-60. The process for hydrogenating methylenedianiline containing at least 40% oligomer function by weight comprises: contacting the feedstock with hydrogen in the presence of a rhodium/ruthenium containing catalyst system carried on a lithium aluminate support under conditions for effecting ring hydrogenation.

La présente invention a pour objet un procédé d'hydrogénation catalytique de charges de méthanedianiline, ordinairement désignées comme MDA-50 et MDA-60, chargées d'impuretés. Le procédé d'hydrogénation de la méthanedianiline contenant au moins 40 % de fonction oligomère en poids comprend la mise en contact de la charge d'alimentation avec de l'hydrogène en présence d'un système de catalyseur contenant du rhodium/ruthénium sur un support d'aluminate de lithium, dans les conditions propices à l'hydrogénation des cycles.

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