Method for producing butadiene from n-butane

US7417173B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Sven Crone · Schifferstadt, DE
• Catharina Klanner · Mannheim, DE
• Gotz-Peter Schindler · Mannheim, DE
• Mark Duda · Ludwigshafen, DE
• Frieder Borgmeier · Mannheim, DE

Key dates

• Filing date: Nov 11, 2005
• Grant date: Aug 26, 2008
• Expiry date: Nov 26, 2025

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C5/48
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Processes for producing butadiene from n-butane comprising: (a) providing a feed gas stream comprising n-butane; (b) non-oxidatively dehydrogenating the feed gas stream in the presence of a catalyst in a first dehydrogenation zone to form a first intermediate gas stream comprising n-butane, 1-butene, 2-butene, butadiene and hydrogen; (c) oxidatively dehydrogenating the first intermediate gas stream in the presence of an oxygenous gas having an oxygen content of at least 75% by volume in a second dehydrogenation zone to form a second intermediate gas stream comprising n-butane, butadiene, hydrogen, carbon dioxide and steam; (d) compressing and cooling the second intermediate gas to form a first condensate stream comprising water and a third intermediate gas stream comprising n-butane, butadiene, hydrogen, carbon dioxide and steam; (e) compressing and cooling the third intermediate gas to form a second condensate stream comprising n-butane, butadiene and water and a fourth intermediate gas stream comprising n-butane, butadiene, hydrogen and carbon dioxide; (1) cooling the fourth intermediate gas stream to form a third condensate stream comprising n-butane and butadiene, and an offgas…