Method for producing aromatic amines or aliphatic amino alcohols

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, VANOPPEN DOMINIC, VAN LAAR FREDERIK, BEUERMANN THOMAS, VOSS HARTWIG, SCHWAB EKKEHARD, PENZEL ULRICH, MORGENSCHWEIS KONRAD, OEHLENSCHLAEGER STEFFEN
Format: Patent
Sprache:eng
Schlagworte:
ACYCLIC OR CARBOCYCLIC COMPOUNDS
CHEMISTRY
METALLURGY
ORGANIC CHEMISTRY
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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.