Work-up of the ammoximation products of ketones by liquid-liquid extraction in a ternary solvent system

US6620970B2 · kind B2 · utility

Assignee

• Degussa AG · DE

Inventors

• Thomas Schiffer · Haltern, DE
• Peter Esser · Recklinghausen, DE
• Jorg Krissmann · Marl, DE
• Martin Roos · Oestrich-Winkel, DE
• Günter Stevermüer · Marl, DE
• Georg Thiele · Hanau, DE

Key dates

• Filing date: Sep 3, 2002
• Grant date: Sep 16, 2003
• Expiry date: Sep 3, 2022

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C2601/20
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

The present invention relates to a process for working up an ammoximation reaction mixture, by separating a catalyst from the reaction mixture, removing the ketone oxime product, discharging the water of the reaction, and recirculating a solvent, where the ketone oxime formed is removed in a liquid phase with at least one liquid-liquid extraction in a ternary solvent system.