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AssigneeBASF SE
InventorsArmin Lange de Oliveira, Barbara Wucher, Christian Bechtold, Michael Friko, Renate Hempel
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The present invention relates to a process for continuous hydrogenation of a nitro compound to the corresponding amine in a liquid reaction mixture comprising the nitro compound in the presence of a supported catalyst which comprises as the active component at least one element from groups 7 to 12 of the periodic table of the elements, wherein the hydrogenation is performed in the presence of at least one salt selected from the group consisting of the salts of the alkali metals, alkaline earth metals and of the rare earth metals and to a supported catalyst for continuous hydrogenation of a nitro compound to the corresponding amine in a liquid reaction mixture comprising the nitro compound which comprises as the active component at least one element from groups 7 to 12 of the periodic table of the elements and one salt of the alkali metals, alkaline earth metals or of the rare earth metals.
A process for continuous hydrogenation of dinitrotoluene to toluenediamine in a liquid reaction mixture, the process comprising hydrogenating dinitrotoluene in the presence of a supported catalyst that comprises an active component comprising a mixture of nickel and platinum in an atomic ratio of from 30:70 to 70:30 and optionally one or more additional metals, wherein the hydrogenating is performed in the presence of at least one salt selected from the group consisting of a salt of an alkali metal, a salt of an alkaline earth metal and a salt of a rare earth metal.
Dependencies are inferred from the claim text.