Purity of 1,6-hexanediol

US5767329A · kind A · utility

Assignee

• BASF SE

Inventors

• Roman Dostalek · Neuleiningen, DE
• Rolf Fischer · Heidelberg, DE
• Wolfgang Harder · Weinheim, DE
• Axel Paul · Lampertheim, DE
• Rolf Pinkos · Bad Dürkheim, DE

Key dates

• Filing date: Jul 1, 1997
• Grant date: Jun 16, 1998
• Expiry date: Jul 1, 2017

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C59/01
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Impurities are separated from aqueous solutions of 1,6-hexanediol or 1,6-hexanediol precursors, such as adipic and 6-hydroxycaproic acid, by a process which comprises adding at least one carboxylic acid to a solution (a) of 1,6-hexanediol and subjecting this solution (a) or a solution (b) containing carboxylic acid(s) as precursor(s) of 1,6-hexanediol to a heat treatment at temperatures above room temperature in the absence of hydrogen.