Process for the production of a catalyst comprising a novel metal on activated carbon
AssigneeDeutsche Gold- und Silber-Scheideanstalt vormals Roessler
InventorsGerhard Vollheim, Karl-Jurgen Troger, Gerhard Lippert
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Abstract
Catalysts of noble metals on activated carbon are subjected to the action of a sulfoxide together with hydrazine or its derivatives. The catalysts are particularly useful in the selective hydrogenation of chloronitro-aromatic compounds.
Claims19
A process for the production of a catalyst of a noble metal on activated carbon suitable for the selective hydrogenation of chloronitro-aromatic compounds comprising treating the noble metal-activated carbon with a sulfoxide of the formula R.sub.1 SOR.sub.2 where R.sub.1 and R.sub.2 are alkyl, aralkyl or aryl and then with a hydrazine material having the formula R.sub.3 NHNH.sub.2 where R.sub.3 is hydrogen, alkyl, aryl, aralkyl or alkenyl.
A process for the production of a catalyst of a noble metal on activated carbon suitable for the selective hydrogenation of chloronitro aromatic compounds consisting essentially of treating the noble metal-activated carbon with a sulfoxide of the formula R.sub.1 SOR.sub.2 where R.sub.1 and R.sub.2 are alkyl, aralkyl or aryl and then with a hydrazine material having the formula R.sub.3 NHNH.sub.2 where R.sub.3 is hydrogen, alkyl, aryl, aralkyl or alkenyl, the two steps of said treatment being carried out at 50.degree.-80.degree.C and using 0.1 to 10 moles of sulfoxide and 0.1 to 10 moles of hydrazine material per mole of noble metal.
Dependencies are inferred from the claim text.