Process for removing compounds containing phenolic hydroxy groups from aromatic amines

US7488850B2 · kind B2 · utility

Assignee

• Bayer MaterialScience AG · DE

Inventors

• Knut Sommer · Krefeld, DE
• Markus Dugal · Kempen, DE
• Ido Schwarz · Mülheim an der Ruhr, DE
• Stefan Wershofen · Mönchengladbach, DE
• Peter Lehner · Baytown, US
• Stephan Schubert · Leverkusen, DE
• Alexandra Große Böwing · Dormagen, DE

Key dates

• Filing date: Nov 6, 2007
• Grant date: Feb 10, 2009
• Expiry date: Nov 6, 2027

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C209/36
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Compounds containing phenolic hydroxy groups are removed from a gas stream which contains at least one aromatic amine generated during the gas-phase hydrogenation reaction of the corresponding nitroaromatic compounds with hydrogen, by adsorption on a basic solid.