Preparation of concentrated aqueous solutions of quaternization products of tertiary aminoalkyl esters or tertiary aminoalkylamides of acrylic or methacrylic acid

US4520210A · kind A · utility

Assignee

• BASF SE

Inventors

• Kurt Schneider · Farmington, US
• Wilfried Heide · Freinsheim, DE
• Juergen Hartmann · Ludwigshafen, DE
• Heinrich Hartmann · Schifferstadt, DE

Key dates

• Filing date: Nov 30, 1983
• Grant date: May 28, 1985
• Expiry date: Nov 30, 2003

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C213/08
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Concentrated aqueous solutions of quaternization products of tertiary aminoalkyl esters or tertiary aminoalkylamides of acrylic or methacrylic acid are prepared by reaction of the corresponding esters or amides with an alkylating agent in a water-soluble ketone as solvent, by a process wherein, in order to isolate the quaternization product, an amount of water is added to the reaction mixture such that two phases form, and the lower aqueous phase, which contains the quaternization product in solution, is separated from the upper phase, which contains the ketone and residual alkylating agent.