Method for producing 1, 6 hexane diol

US7307194B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Tilman Sirch · Schifferstadt, DE
• Gerd-Dieter Tebben · Mannheim, DE
• Ludwig E. Heck · Edingen-Neckarhausen, DE
• Armin Diefenbacher · Germersheim, DE
• Alfred Krause · Speyer, DE
• Franz Borgel · Dirmstein, DE

Key dates

• Filing date: Oct 27, 2005
• Grant date: Dec 11, 2007
• Expiry date: Oct 27, 2025

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C29/149
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

The present invention provides a process for preparing 1,6-hexanediol from a carboxylic acid mixture which comprises adipic acid, 6-hydroxycaproic acid and small amounts of 1,4-cyclohexanediols and is obtained as a by-product in the oxidation of cyclohexane to cyclohexanone/cyclohexanol with oxygen or oxygen-containing gases and by water extraction of the reaction mixture, by esterification of the acids and hydrogenation, in which