Process for obtaining maleic anhydride by distillation

US8461356B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Gunther Windecker · Ludwigshafen, DE
• Gerd Kaibel · Lampertheim, DE
• Michael Steiniger · Neustadt, DE
• Thilo Buntrock · Mutterstadt, DE
• Jens Weiguny · Freinsheim, DE
• Dany Vanden Hautte · Boussu, BE
• Thierry Lurquin · Feluy, BE

Key dates

• Filing date: Mar 19, 2008
• Grant date: Jun 11, 2013
• Expiry date: Mar 13, 2030

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C51/573
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

What is described is a process for obtaining maleic anhydride by distillation from a solution of maleic anhydride in a high-boiling absorbent which has been obtained by gas phase oxidation of a hydrocarbon and at least partial absorption of the oxidation products into the absorbent, by The maleic anhydride obtained as a side draw has a low content of acrylic acid and acetic acid.