Process for the selective hydrogenation of alkynes

US4831200A · kind A · utility

Assignee

• Labofina, S.A. · BE

Inventors

• Guy Debras · Les Bons Villers, BE
• Georges E. M. J. De Clippeleir · Brugge, BE
• Jacques Grootjans · Leefdaal, BE
• Raymond M. Cahen · Brussels, BE

Key dates

• Filing date: Dec 30, 1987
• Grant date: May 16, 1989
• Expiry date: Dec 30, 2007

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S526/912
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Alkynes are selectively hydrogenated in alkene rich hydrocarbon feeds, such as 1,3-butadiene-rich C.sub.4 cuts, by passing the hydrocarbon feed at least partially in liquid phase over a palladium-based catalyst in the presence of hydrogen, preferably in trickle mode, followed by passing the effluent, at least partially in liquid phase preferably containing about 300-400 ppmw alkynes, over a copper-based catalyst in the presence of hydrogen thereby producing a hydrocarbon product of significantly reduced alkyne concentration.