Process for preparing an aromatic amine and apparatus therefor

US8748665B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Tilmann Steinmetz · Havelsee, DE
• Michael Nilles · Frankenthal (Pfalz), DE
• Lucia Koenigsmann · Stuttgart, DE
• Andreas Heussler · Haßloch, DE
• Nikolaus Zafred · Ludwigshafen, DE

Key dates

• Filing date: May 6, 2010
• Grant date: Jun 10, 2014
• Expiry date: Jun 20, 2030

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C209/86
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

The invention relates to a process for obtaining at least one aromatic amine from a liquid mixture comprising water and the at least one aromatic amine by extracting with at least one nitroaromatic in an extraction column (1) to form an essentially water- comprising raffinate stream and an extract stream comprising the at least one nitroaromatic and the aromatic amine. The extraction column (1) is divided by a dividing wall (3) into two regions (5, 7), and, in the case of an amount of liquid for separation which is less than a minimum cross sectional loading of the entire extraction column (1), the liquid mixture to be separated is fed only to one of the regions (5, 7) of the extraction column (1) divided by the dividing wall (3). The invention further relates to a process for preparing an aromatic amine and to an apparatus for separating a liquid mixture comprising water and at least one aromatic amine by extracting with at least one nitroaromatic, comprising an extraction column (1).