Process for the purification of waste acetic acid

US5306398A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Andreas Seidel · Dormagen, DE
• Alfred Hauser · Lechenich, DE
• Erhard Jagers · Bornheim, DE

Key dates

• Filing date: Nov 19, 1992
• Grant date: Apr 26, 1994
• Expiry date: Nov 19, 2012

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C51/487
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Waste acetic acid, which is contaminated by nitrogen compounds and also by hardly hydrolyzable halogen compounds, is purified by adding a complex-forming metal or one of the compounds thereof and a basic compound. The resultant mixture is kept at a temperature between 25.degree. and 118.degree. C. over a period of time of 1 to 6 hours. Finally, purified acetic acid is removed from the mixture by distilling.