The selective liquid phase hydrogenation of 2,4-dinitrotoluene (2,4-DNT) to the corresponding 2,4-nitroarylhydroxylamines has been studied over supported Pd, Pt, and Ru catalysts. Pt and Pd samples were found more active and selective than Ru. On the palladium catalysts the influence of metal particle size, temperature and nature of the support on the catalytic activity and selectivity has been also investigated. Both specific activity and selectivity were found to be dependent on the palladium particle size. Larger Pd particles were found more active and selective towards the formation of the nitroarylhydroxylamines The results reported have been interpreted on the basis of a different geometry and strength of adsorption of the substrate on the active sites. The products distribution is influenced also by the acid-base properties of the support used.
Selective Catalytic Hydrogenation of 2,4-dinitrotoluene to nitroarylhydroxylamines on supported metal catalysts / Musolino, Maria Grazia.; Milone, C.; Neri, G.; Bonaccorsi, L.; Pietropaolo, R.; Galvagno, S.. - 108:(1997), pp. 239-246. (Intervento presentato al convegno 4th International Symposium on Heterogeneous Catalysis and Fine Chemical tenutosi a Basel (Switzerland) nel 8 - 12 settembre) [10.1016/S0167-2991(97)80910-X].
Selective Catalytic Hydrogenation of 2,4-dinitrotoluene to nitroarylhydroxylamines on supported metal catalysts
Maria Grazia. MUSOLINO;L. BONACCORSI;R. PIETROPAOLO;
1997-01-01
Abstract
The selective liquid phase hydrogenation of 2,4-dinitrotoluene (2,4-DNT) to the corresponding 2,4-nitroarylhydroxylamines has been studied over supported Pd, Pt, and Ru catalysts. Pt and Pd samples were found more active and selective than Ru. On the palladium catalysts the influence of metal particle size, temperature and nature of the support on the catalytic activity and selectivity has been also investigated. Both specific activity and selectivity were found to be dependent on the palladium particle size. Larger Pd particles were found more active and selective towards the formation of the nitroarylhydroxylamines The results reported have been interpreted on the basis of a different geometry and strength of adsorption of the substrate on the active sites. The products distribution is influenced also by the acid-base properties of the support used.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
