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AssigneeEvonik Industries AG
InventorsFelix Westerhaus, Rajenahally Venkataswamygowda Jagadeesh, Gerrit Wienhofer, Annette-Enrica Surkus, Kathrin Junge, Henrik Junge, Matthias Beller
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The invention relates to the use of thermally-treated supported cobalt catalysts for hydrogenating aromatic nitro compounds, the cobalt catalysts having been prepared by in situ immobilization of a cobalt-amine complex on an inorganic porous support and subsequent pyrolysis, and, in the cobalt-amine complex used, cobalt being present bonded to an aromatic or heterocyclic nitrogen ligand L, the nitrogen ligand being selected so as to form a polyaromatic structure with the cobalt atom.
A process for hydrogenating aromatic nitro compounds which comprises using a thermally-treated supported cobalt as a catalyst for the hydrogenating, wherein the cobalt catalyst has been prepared by in situ immobilization of a cobalt-amine complex on an inorganic porous support and subsequent pyrolysis, and, in the cobalt-amine complex used, cobalt being present bonded to an aromatic or heterocyclic nitrogen ligand L, the nitrogen ligand being selected so as to form a polyaromatic structure with the cobalt atom.
A supported cobalt-nitrogen ligand complex on a carbon support (C) with the formula Co-L/C, which has been thermally treated at 750 to 850° C., wherein the ligand L is selected from the group comprising L1:
Dependencies are inferred from the claim text.