Method for the production of 1,4- butane-diol by combined gas-phase and liquid-phase hydrogenation

US7169958B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Michael Hesse · Westlake Village, US
• Stephan Schlitter · Schifferstadt, DE
• Holger Borchert · Offstein, DE
• Markus Schubert · Ludwigshafen, DE
• Markus Rösch · Oppenheim, DE
• Nils Bottke · Ludwigshafen am Rhein, DE
• Rolf Fischer · Heidelberg, DE
• Alexander Weck · Freinsheim, DE
• Gunther Windecker · Ludwigshafen, DE
• Gunnar Heydrich · Schifferstadt, DE

Key dates

• Filing date: Jun 10, 2003
• Grant date: Jan 30, 2007
• Expiry date: Jan 19, 2024

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C29/149
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

The present invention relates to a process for preparing optionally alkyl-substituted 1,4-butanediol by two-stage catalytic hydrogenation in the gas phase of C4-dicarboxylic acids and/or of derivatives thereof having the following steps: