Process for the production of low-viscosity amphoteric surfactants

US4833253A · kind A · utility

Assignee

• Henkel Kommanditgesellschaft auf Aktien · DE

Inventors

• Uwe Ploog · Haan, DE
• Guenter Uphues · Monheim, DE
• Peter Nikolaus · Hilden, DE

Key dates

• Filing date: Dec 7, 1987
• Grant date: May 23, 1989
• Expiry date: Dec 7, 2007

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07D233/12
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Low viscosity amphoteric surfactants are prepared by quaternization of low diamine content imidazolines by a process in which certain addition and temperature parameters are strictly observed. Imidazolines suitable as a starting material may be obtained by heating fatty acids and aminoethanolamine in an inert solvent until water is eliminated, removing the water formed from the reaction mixture by azeotropic distillation and, finally, distilling off the solvent and the residual amine.