Coammoxidation of ketones

US7608738B2 · kind B2 · utility

Assignee

• Degussa AG · DE

Inventors

• Juergen Herwig
• Martin Roos · Oestrich-Winkel, DE
• Georg Oenbrink · Schneverdingen, DE
• Bernd Guenzel · Haltern am See, DE
• Dirk Kuppert · Frankfurt, DE

Key dates

• Filing date: Aug 2, 2004
• Grant date: Oct 27, 2009
• Expiry date: Apr 14, 2025

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 the coammoximation, that is to say for the simultaneous ammoximation, of ketones, in particular of cyclic ketones such as cyclododecanone and cyclohexanone. Ammoximation is taken to mean here the preparation of oximes from ketones or aldehydes together with hydrogen peroxide and ammonia and in the presence of a catalyst which essentially consists of silicon, titanium and oxygen, for example titanium silicalite.