Method of producing symmetrical difatty acid diamides

US5312933A · kind A · utility

Assignee

• Battelle Institute e.V. · DE

Inventors

• Rainer Frische · Frankfurt, DE
• Jurgen Volkheimer · Hanau, DE
• Klaus Wollmann
• Herrmann Schomann · Langen, DE
• Judith Schneider · Frankfurt am Main, DE
• Alexander Ach · Frankfurt am Main, DE
• Renate Gross-Lannert · Dietzenbach, DE
• Bernd Best · Mörfelden, DE

Key dates

• Filing date: Feb 28, 1991
• Grant date: May 17, 1994
• Expiry date: Feb 28, 2011

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C231/02
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

The present invention relates to a process of producing symmetrically structured difatty acid diamines by reacting mixtures of fatty acids or their esters with diamines, isolating the symmetrical difatty acid diamides from the reaction mixture by making use of their different solubilities and concentrating them by recrystallisation if necessary. The invention also provides for a process of isolating a fatty acid from a mixture of fatty acids wherein the difatty acid diamides produced in the process of the invention are saponified to yield the corresponding free fatty acid.