Method for the production of butadiene

US7488858B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Thorsten Johann · Schifferstadt, DE
• Gotz-Peter Schindler · Mannheim, DE
• Andreas Brodhagen · Schifferstadt, DE
• Sven Crone · Schifferstadt, DE
• Mark Duda · Ludwigshafen, DE

Key dates

• Filing date: Dec 30, 2004
• Grant date: Feb 10, 2009
• Expiry date: Apr 14, 2025

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C11/167
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

The disclosure involves a process for preparing butadiene from n-butane. In the process, n-butane is first dehydrogenated autothermally under nonoxidative conditions to form a gas stream. The gas stream is then oxidatively dehydrogenated to form a second gas stream. From the second gas stream, a third gas stream containing n-butane, 2-butene and butadiene is obtained. From the third gas stream, a butadiene/butaine product stream is obtained and remaining n-butane and 2-butene is recycled into the first dehydrogenation zone.