Preparation of 2,4-dihydroxybenzoic acid

US4996354A · kind A · utility

Assignee

• BASF SE

Inventors

• Peter Neumann · Wiesloch, DE
• Ulrich Eichenauer · Frankfurt, DE

Key dates

• Filing date: Sep 1, 1989
• Grant date: Feb 26, 1991
• Expiry date: Sep 1, 2009

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C51/15
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

2,4-Dihydroxybenzoic acid is prepared in a solids mixer by reacting resorcinol with an alkali metal bicarbonate and/or alklai metal carbonate in a carbon dioxide atmosphere using as the alkali metal bicarbonate or alkali metal carbonate a mixture of the corresponding sodium and potassium salts.