Method for producing aromatic amines or aliphatic amino alcohols

US7595424B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Dominic Vanoppen · Kapellen, BE
• Frederik van Laar · Dubai, AE
• Thomas Beuermann · Mannheim, DE
• Georg Krug · Bad Kissingen, DE
• Steffen Oehlenschlaeger · Ludwigshafen, DE
• Ekkehard Schwab · Neustadt, DE
• Hartwig Voss · Bischofswerda, DE
• Konrad Morgenschweis · Dresden, DE
• Ulrich Penzel · Lauscha, DE
• Dietrich Tittelbach-Helmrich · Königsbrück, DE

Key dates

• Filing date: Feb 22, 2006
• Grant date: Sep 29, 2009
• Expiry date: Feb 22, 2026

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01J2219/00263
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

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.