Method of producing amines

US7205440B2 · kind B2 · utility

Assignee

• LANXESS Deutschland GmbH · DE

Inventors

• Peter Wenzl · Cologne, DE
• Friedrich Dürrholz · Remscheid, DE
• Herbert Diehl · Leverkusen, DE

Key dates

• Filing date: Dec 17, 2002
• Grant date: Apr 17, 2007
• Expiry date: Sep 27, 2023

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C209/56
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

The invention relates to a special two-step method for producing amines on the basis of amides by reacting them with halides or hypohalites in an aqueous solution in a Hofmann degradation reaction. The amide is reacted in an alkaline solution and/or suspension with halides or hypohalites and the reaction mixture obtained in step 1 is added to an aqueous alkaline solution having a temperature of at least 40° C.