Process for the preparation of highly viscous amphotensides

• Main Authors: UPHUES, GUNTER, PLOOG, UWE, NIKOLAUS, PETER
• Format: Patent
• Language: English; French; German
• Published: 27.07.1988
• Subjects: ADHESIVES; ANIMAL AND VEGETABLE OILS, FATS, FATTY SUBSTANCES AND WAXES; CANDLES; CHEMISTRY; DETERGENT COMPOSITIONS; DETERGENTS; DYES; FATTY ACIDS THEREFROM; HETEROCYCLIC COMPOUNDS; MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; ORGANIC CHEMISTRY; PAINTS; POLISHES; RECOVERY OF GLYCEROL; RESIN SOAPS; SOAP OR SOAP-MAKING; USE OF SINGLE SUBSTANCES AS DETERGENTS

Dünnflüssige Amphotenside werden durch Quaternierung diaminarmer Imidazoline unter genauer Einhaltung bestimmter Zugabe- und Temperaturparameter hergestellt. Als Ausgangsmaterial geeignete Imidazoline können dadurch erhalten werden, daß man Fettsäuren und Aminoethanolamin in einem inerten Lösungsmittel bis zur Wasserabspaltung erhitzt, das gebildete Wasser durch azeotrope Destillation aus dem Reaktionsgemisch entfernt und schließlich das Lösungsmittel mit dem restlichen Amin abdestilliert. 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.