Two-stage method for producing butanediol with intermediated separation of succinic anhydride

US7271299B2 · 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 11, 2003
• Grant date: Sep 18, 2007
• Expiry date: Dec 30, 2023

Classification

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

Abstract

Optionally alkyl-substituted 1,4-butanediol is prepared from C4-dicarboxylic acids and/or of derivatives thereof by: The catalysts employed in each of the hydrogenation stages comprise ≦95% by weight of CuO, and ≦5% by weight of an oxidic support, and the second reactor has a higher pressure than the first reactor.