Process for hydrogenating an aromatic amine in the presence of a supported ruthenium catalyst
AssigneeDegussa AG
InventorsGuido Stochniol, Bernd Jaeger, Thomas Haas, Norbert Finke, Werner Burkhardt, Juergen Grunert
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Abstract
The invention relates to a process for hydrogenating an aromatic amine that has at least one amino group bound to an aromatic nucleus with hydrogen in the presence of a supported catalyst that contains at least ruthenium as active metal. The catalyst support has a BET surface area in the range from greater than 30 m2/g to less than 70 m2/g and more than 50% of the pore volume of the catalyst support is formed by macropores having a pore diameter of greater than 50 nm and less than 50% are mesopores having a pore diameter of 2 to 50 nm.
Claims9
A supported catalyst comprising, as active metal, ruthenium alone or together with at least one metal selected from the group consisting of the first, seventh or eighth subgroup of the periodic system in an amount of 0.01 to 20 wt % of active metal, based on the supported catalyst, and a support, support, selected from the group consisting of Al2O3, TiO2, ZrO2SiO2MgO, ZnO, spinels, aluminium silicates and active carbons and mixtures thereof, wherein the support has a BET surface area ranging from 32 m2/g to 67 m2/g, and wherein at least 55% of the pore volume of the catalyst support are macropores having a pore diameter of greater than 50 nm and less than 45% are mesopores having a pore diameter of 2 to 50 nm.
Dependencies are inferred from the claim text.