| 摘要 |
<p>A process is provided for the regeneration of a heterogeneous catalyst used for the preparation of compounds containing NH<SUB>2 </SUB>groups by the hydrogenation, with hydrogen, of compounds containing at least one unsaturated carbon-nitrogen bond, wherein a) the feed of the compound to be hydrogenated is stopped and b) the heterogeneous catalyst is treated with a compound of the formula <?in-line-formulae description="In-line Formulae" end="lead"?>R<SUP>1</SUP>R<SUP>2</SUP>N-CO-R<SUP>3</SUP> (I),<?in-line-formulae description="In-line Formulae" end="tail"?> in which R<SUP>1 </SUP>is hydrogen or C<SUB>1</SUB>-C<SUB>4 </SUB>alkyl and R<SUP>2</SUP>, R<SUP>3 </SUP>independently of one another are each hydrogen or C<SUB>1</SUB>-C<SUB>4 </SUB>alkyl or together are a C<SUB>3</SUB>-C<SUB>6 </SUB>alkylene group, or mixtures of such compounds, at a pressure ranging from 0.1 to 30 MPa and a temperature ranging from 100 to 300° C., with the proviso that the compound of formula (I) is in liquid form during the treatment.</p> |
