Method for the synthesis of amphoteric surfactants

US5491245A · kind A · utility

Assignee

• Th. Goldschmidt. AG · DE

Inventors

• Burghard Gruning · Essen, DE
• Christian Weitemeyer · Essen, DE

Key dates

• Filing date: Mar 15, 1994
• Grant date: Feb 13, 1996
• Expiry date: Mar 15, 2014

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C227/08
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

A method for the synthesis of amphoteric surfactants by the reaction of amines with chloroacetic acid or its salts in aqueous solution at an elevated temperature, consists of reacting compounds of the general formula ##STR1## with chloroacetic acid at temperatures ranging from 115.degree. to 180.degree. C., until the chloroacetic acid content is less than 10 ppm.