Processo para a produção de aminas aromáticas e catalisador

Prodn. of an aromatic amine of formula Ar-NH2 (I) comprises gas phase hydrogenation of a nitroaromatic of formula ArNO2 (II) with H2 over a stationary catalyst (C). The H2 supply to the catalyst is 30-6000 equiv. per NO2 gp. equiv. Ar = phenyl (substd. by R1 and R2); R1 = H, Me or Et; R2 = H, Me, Et...

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Bibliographische Detailangaben
Hauptverfasser:	URSULA PENTLING, HANS-JOSEF BUYSCH, REINHARD LANGER
Format:	Patent
Sprache:	por
Schlagworte:	ACYCLIC OR CARBOCYCLIC COMPOUNDS APPARATUS THEREFOR CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY CHEMISTRY GENERAL METHODS OF ORGANIC CHEMISTRY METALLURGY ORGANIC CHEMISTRY PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL THEIR RELEVANT APPARATUS TRANSPORTING
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Beschreibung
Zusammenfassung:	Prodn. of an aromatic amine of formula Ar-NH2 (I) comprises gas phase hydrogenation of a nitroaromatic of formula ArNO2 (II) with H2 over a stationary catalyst (C). The H2 supply to the catalyst is 30-6000 equiv. per NO2 gp. equiv. Ar = phenyl (substd. by R1 and R2); R1 = H, Me or Et; R2 = H, Me, Et, NH2. (C) comprises Pd and Pb on a graphite or graphitised coke support with a BET surface area of 0.2-10 m /g, contg. 0.001-7 wt.% Pd w.r.t. total catalyst and 0.1-50 wt.% Pb w.r.t. Pd. Also claimed is (C), esp. for the hydrogenation of nitro-aromatics.