Treatment of aqueous solutions obtained in the carbalkoxylation of olefinically unsaturated compounds

US4861895A · kind A · utility

Assignee

• BASF SE

Inventors

• Werner Bertleff · Viernheim, DE
• Robert Maerkl
• Peter Magnussen · Bad Dürkheim, DE
• Gebhard Kuehn · Ludwigshafen, DE
• Peter Stops · Altrip, DE

Key dates

• Filing date: Jul 24, 1987
• Grant date: Aug 29, 1989
• Expiry date: Jul 24, 2007

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C67/60
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Aqueous solutions which are obtained in the carbalkoxylation of olefinically unsaturated compounds and contain heterocyclic aromatic nitrogen bases, their transformation products and lower fatty acids and/or their salts are treated by a process in which (a) the aqueous solution is heated to 150.degree.-300.degree. C. under from 10 to 300 bar and (b) heterocyclic aromatic nitrogen bases which are formed again from the transformation products are then separated off.