Process for purifying aniline from gas phase hydrogenations

US9233910B2 · kind B2 · utility

Assignee

• Bayer Intellectual Property GmbH · DE

Inventors

• Peter Lehner · Baytown, US
• Knut Sommer · Krefeld, DE
• Amgad Salah Moussa

Key dates

• Filing date: Oct 17, 2011
• Grant date: Jan 12, 2016
• Expiry date: Jan 10, 2032

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C209/84
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

The invention relates to a process for purifying aniline produced by gas-phase hydrogenation of nitrobenzene, by fractional condensation of the crude reaction product obtained in gaseous form so that at least two liquid process products, a partial condensate (PK) and a total condensate (TK), are obtained.