Obtaining aqueous solutions of organic acids or bases from aqueous solutions of their salts

US4818409A · kind A · utility

Assignee

• BASF SE

Inventors

• Hermann Puetter · Neustadt, DE
• Hartwig Voss · Bischofswerda, DE

Key dates

• Filing date: Mar 21, 1986
• Grant date: Apr 4, 1989
• Expiry date: Mar 21, 2006

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C51/02
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

Aqueous solutions of organic acids or bases are obtained by a process in which (a) an aqueous solution of a salt of an organic acid or of an organic base and (b) respectively, an aqueous solution of an inorganic base or of an inorganic acid are each passed into compartments of an exchange cell which are separated from one another by an ion exchange membrane, and the solution (a) and (b) are transported past the surface of the membrane.