Degussa Aktiengesellschaft

Evonik Degussa Gmbh

Rolf Hartung

Andreas Freund

Emmanuel Auer

Michael Gross

Franz Hitzel-Zerrahn

Jörg Pietsch

Gerhard Lippert

The present invention focuses on a process for the hydrogenation of aromatic or heteroaromatic compounds and in particular on the ring hydrogenation of compounds having the formula (I). Aromatic amino acids and amino alcohols can be successfully ring-hydrogenated using a platinum-rhodium mixed catalyst. The products can be used inter alia as mimetics in bioactive peptide active ingredients.

Process for the hydrogenation of aromatic compounds

A multimetallic catalyst for hydrogenation of substituted nitroaromatic compounds to give the corresponding aromatic amines. By doping iridium with at least one element from the group manganese, cobalt, iron, nickel, copper and ruthenium, a catalyst is obtained which is characterized by high selectivity.

Multimetallic catalyst and process for preparing substituted aromatic amines

Anhydrous, solid Raney catalysts in fusible, organic embedding media prepared by initially introducing a Raney catalyst slurry into a vacuum mixer under an inert gas atmosphere, admixing the embedding medium, removing the main quantity of the water at temperatures below the melting point of the embedding medium and removing the residual water above the melting point of the embedding medium in vacuum while maintaining mixing. After the dehydration, the vacuum is terminated by applying an inert gas and the product where called for is shaped into low-surface molded bodies.

Anhydrous solid Raney-catalyst dispersion and a process for its

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Neuberg, Germany

Rolf Hartung