Preparation of alkenes by partial hydrogenation of alkynes over fixed-bed palladium catalysts

US5750806A · kind A · utility

Assignee

• BASF SE

Inventors

• Franz Josef Brocker · Ludwigshafen, DE
• Manfred Stroezel · Ilvesheim, DE
• Udo Rheude · Otterstadt, DE

Key dates

• Filing date: Jul 12, 1996
• Grant date: May 12, 1998
• Expiry date: Jul 12, 2016

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C2523/44
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

Alkenes are prepared by partial hydrogenation of alkynes in the liquid phase over palladium catalysts by a process which comprises PA0 A. using a fixed-bed catalyst which is obtainable by heating the preferably metallic carrier in the air, cooling, coating under reduced pressure with metallic palladium, suitable molding and processing to a monolithic catalyst elements and PA0 B. adding from 10 to 180 ppm of CO to the hydrogen used for the hydrogenation.