Recovery of 1,3-butadiene from a C.sub.4 -hydrocarbon mixture

US4049742A · kind A · utility

Assignee

• BASF SE

Inventors

• Hans-Martin Weitz · Bad Dürkheim, DE
• Ulrich Wagner · Bernburg, DE
• Klaus Volkamer · Bischofswerda, DE
• Eckart Schubert · Ludwigshafen, DE
• Friedhelm Bandermann · Velbert, DE

Key dates

• Filing date: Mar 23, 1976
• Grant date: Sep 20, 1977
• Expiry date: Mar 23, 1996

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C7/163
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

1,3-Butadiene is recovered with the aid of a selective solvent from a C.sub.4 -hydocarbon mixture containing 1,3-butadiene, hydrocarbons which are more soluble in said selective solvent than 1,3-butadiene, including acetylenes and possibly 1,2-butadiene and C.sub.5 -hydrocarbons, and hydrocarbons which are less soluble in said selective solvent than 1,3-butadiene. The C.sub.4 -hydrocarbon mixture is separated by the use of one or more extractive distilling zones into a distillate containing the less soluble hydrocarbons, a stream consisting of 1,3-butadiene and a stream containing the more soluble hydrocarbons including the higher acetylenes and 1,3-butadiene, the latter stream being subjected to catalytic hydrogenation.