| abstract |
The present invention relates to the use of modified raney catalysts to obtain diamino aromatic compounds by hydrogenation of the corresponding dinitro aromatic compound, characterized in that Raney catalysts are those that have been obtained by alkali treatment of an alloy of a 50 to 95 percent by weight of aluminum, 4 to 45 percent by weight of nickel and / or cobalt and 1 to 46 percent by weight of at least one modifier metal, complementing the mentioned percentages to 100, and where the modifying metals are those of the 1st, 4th, 5th, 6th, 7th and / or 8th secondary groups of the periodic element system. |