A process for the regeneration of catalysts

A method for regenerating a containing compounds for the preparation of NH¶2¶ groups by hydrogenation of compounds containing at least one unsaturated carbon-nitrogen bond with hydrogen used heterogeneous catalyst, characterized in that A DOLLAR a) the supply of the to stops hydrogenated compound and DOLLAR a b) the heterogeneous catalyst with a compound of formula DOLLAR AR · 1 · R · 2 · N-CO-R · 3 · (I), wherein a DOLLAR DOLLAR AR · 1 · hydrogen, C¶1 ¶ C¶4¶-alkyl, DOLLAR AR * 2 *, R * 3 * are each independently hydrogen, C¶1¶ C¶4¶-alkyl or together represent an alkylene C¶3¶-C¶6¶ mean group a DOLLAR, DOLLAR a treated or mixtures thereof at a pressure in the range of 0.1 to 30 MPa and a temperature in the range of 100 to 300 ° C, with the proviso that the compound of formula (I) in the present treatment liquid.