Method for producing 1,6-hexanediol

US8629306B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Rolf Pinkos · Bad Dürkheim, DE
• Daniel Breuninger · Frankenthal (Pfalz), DE
• Gerd-Dieter Tebben · Mannheim, DE

Key dates

• Filing date: Mar 29, 2010
• Grant date: Jan 14, 2014
• Expiry date: Jan 19, 2031

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C67/08
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

The invention relates to a process for preparing 1,6-hexanediol, preferably with at least 99.5% purity, which are especially virtually free of 1,4-cyclohexanediols, from a carboxylic acid mixture which is obtained as a by-product of the catalytic oxidation of cyclohexane to cyclohexanone/cyclohexanol with oxygen or oxygen-comprising gases and by water extraction of the reaction mixture, by hydrogenating the carboxylic acid mixture, esterifying and hydrogenating a substream to hexanediol.