Process for the removal of aldehydes and acetals from industrially prepared acetic acid

US5620567A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Andreas Seidel · Dormagen, DE
• Alfred Hauser · Lechenich, DE
• Peter Prinz · Ethel, US

Key dates

• Filing date: Jul 29, 1994
• Grant date: Apr 15, 1997
• Expiry date: Jul 29, 2014

Classification

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

Abstract

A process for the removal of aldehydes and acetals from industrially prepared acetic acid, wherein the contaminated acetic acid is reacted in the presence of a Bronstedt acid and 0.05 to 1% by weight of water and, if required, of 3 to 10 equivalents, calculated on aldehyde and acetal, of a high boiling polyhydric alcohol, and isolating the purified acetic acid by fractional distillation.