| abstract |
The invention relates to a process for the preparation of amines, wherein at least one compound which has at least one nitro group, in the presence of a supported catalyst which, as the catalytically active metal, nickel, optionally together with at least one metal of I., V., VI. and / or VIII. Subgroup, is reacted with hydrogen, characterized in that the reduced and stabilized supported catalyst nickel crystallites with bimodal nickel crystallite size distribution with maxima at 30 - 80 angstroms and 81 - 150 angstroms on a support made of ZrO 2 , ZrO 2 _HfO 2 and / or SiO 2 -ZrO 2 and / or SiO 2 -ZrO 2 _HfO 2 contains and in the reduced and passivated state a nickel content of 60 - 80% by mass, an SiO 2 content of 0 - 20% by mass, a ZrO 2 Has a content of 0 - 40% by mass, an HfO 2 content of 0 - 4% by mass and, after a one-hour reduction at 100 ° C, has a degree of reduction of at least 70%. |