Process for the production of low-viscosity imidazolinium surfactants by quaternization of 1-hydroxyethyl-2-alkyl imidazolines

US5342961A · kind A · utility

Assignee

• Henkel Kommanditgesellschaft auf Aktien · DE

Inventors

• Guenter Uphues · Monheim, DE
• Sven Jaensch · Goldkronach, DE
• Uwe Ploog · Haan, DE
• Udo Steinberner · Hilden, DE

Key dates

• Filing date: Aug 6, 1993
• Grant date: Aug 30, 1994
• Expiry date: Aug 6, 2013

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07D233/14
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

A process is disclosed for producing fluid imidazolinium tensides by reaction of 1-hydroxyethyl-2-alkylimidazolines with neutralized quaternary agents and hydrolysis of the quaternary products thus obtained with aqueous bases. The 1-hydroxyethyl -2-alkylimidazolines are added at a high temperature to an aqueous solution of the neutralized quaternary agents at a molar proportion between imidazoline derivates and the quaternary agents from 1:1.5 to 1:3. The reaction mixture thus obtained is maintained at a temperature in a range of 70.degree. to 85.degree. C. for 30 to 120 minutes, 0.85 to 1.0 mol alkali metal hydroxides, referred to the amount of quaternary agents added during step (a), are added thereto within the 30 to 120 minutes at a temperature in the range of 75.degree. to 85.degree. C., and the reaction mixture thus obtained is maintained at a temperature in the range of 75.degree. to 90.degree. C. for 140 to 220 minutes. The end products are obtained by a process that is easy to carry out if during step (a) a solution of neutralized quaternary agents is used that contains 0.025 to 0.5 mol of carboxylic acids, referred to the amount to be added of 1-hydroxyethyl-2-alkylimidaz…