Process for producing aromatic amines

US9067864B2 · kind B2 · utility

Assignee

• Bayer MaterialScience AG · DE

Inventors

• Knut Sommer · Krefeld, DE
• Ido Schwarz · Mülheim an der Ruhr, DE
• Susanne Buchholz
• Franz-Ulrich Von Gehlen · Krefeld, DE
• Andre Lago · Hamburg, DE
• Karl-Heinz Wilke · Moers, DE
• Holger Orzesek · Buer, DE
• Hans-Georg Pirkl · Leverkusen, DE
• Peter Lehner · Baytown, US
• Stephan Schubert · Leverkusen, DE

Key dates

• Filing date: Jul 25, 2007
• Grant date: Jun 30, 2015
• Expiry date: Jan 5, 2033

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02P20/10
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Aromatic amines are produced by adiabatic hydrogenation of nitroaromatic compounds in the gas phase on one or more fixed catalysts. The nitroaromatic reactant is passed over the catalyst under pressure and at elevated temperature with hydrogen, water, optionally nitrogen and substantially in the absence of the aromatic amine produced from the nitroaromatic.