Method of manufacturing cis-2,6-dimethylmorpholine

US4778886A · kind A · utility

Assignee

• Huls Aktiengesellschaft · DE

Inventors

• Horst-Wolfram Borsdorff · Oberhausen, DE
• Lothar Broschinski · Werl, DE
• Josef Disteldorf · Herne, DE
• Werner Huebel · Recklinghausen, DE
• Klaus Rindtorff · Holzgerlingen, DE

Key dates

• Filing date: Feb 5, 1988
• Grant date: Oct 18, 1988
• Expiry date: Feb 5, 2008

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07D295/023
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Cis-2,6-dimethylmorpholine is manufactured by catalytic isomerization of trans-2,6-dimethylmorpholine. A previously hydrogen-activated copper chromite catalyst is used for catalytic isomerization of the trans-2,6-dimethylmorpholine. The catalyst preferably also contains barium oxide and/or manganese dioxide. The process is carried out at 180.degree.-300.degree. C. and 1-500 bar absolute. The inexpensive novel catalyst enables conversions which are better than those with known methods.