Method for separating an azepine derivative out of a mixture containing an amine an azepine derivative

US7147757B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Hermann Luyken · Ludwigshafen, DE
• Frank Ohlbach · Mülheim an der Ruhr, DE

Key dates

• Filing date: Mar 6, 2001
• Grant date: Dec 12, 2006
• Expiry date: Jun 4, 2022

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S203/90
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

The invention relates to a method for separating by distillation a portion or the entirety of an azeptine derivative (III), which is selected from the group consisting of aminohexylidene imine, tetrahydroazepine, hexylhexahydroazepine and of aminohexylhexahydroazepine, out of a mixture (II) containing an azepine derivative (III) and an amine (I). The inventive method is characterized in that the distillation is carried out with a maximum bottom temperature of 150° C.