Method for Producing Aromatic Amines or Aliphatic Amino Alcohols

The invention relates to a process for preparing aromatic amines by hydrogenation of nitroaromatics in the presence of catalysts, in which a fluid reaction mixture which comprises amines and from which the catalysts are separated off is formed in a reactor. After the catalysts have been separated of...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	KRUG GEORG, TITTELBACH-HELMRICH DIETRICH, LAAR FREDERIK VAN, VANOPPEN DOMINIC, VOSS HARTWIG, SCHWAB EKKEHARD, OEHLENSCHLAGER STEFFEN, PENZEL ULRICH, MORGENSCHWEIS KONRAD, BEUEMANN THOMAS
Format:	Patent
Sprache:	eng
Schlagworte:	ACYCLIC OR CARBOCYCLIC COMPOUNDS CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY CHEMISTRY METALLURGY ORGANIC CHEMISTRY PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL THEIR RELEVANT APPARATUS TRANSPORTING
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Beschreibung
Zusammenfassung:	The invention relates to a process for preparing aromatic amines by hydrogenation of nitroaromatics in the presence of catalysts, in which a fluid reaction mixture which comprises amines and from which the catalysts are separated off is formed in a reactor. After the catalysts have been separated off, a measurement of the absorption of UV/VIS radiation by the reaction mixture is carried out to determine the concentration of nitro and nitroso compounds in the reaction mixture.