Preparation of C10-C30-alkenes by partial hydrogenation of alkynes over fixed-bed supported palladium catalysts

US6365790B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Klaus Reimer · Mutterstadt, DE
• Gerd Kaibel · Lampertheim, DE
• Ulrich Kammel · Speyer, DE
• Franz Josef Brocker · Ludwigshafen, DE
• Andreas Ansmann · Wiesloch, DE
• Heinz Etzrodt · Neustadt, DE
• Manfred Stroezel · Ilvesheim, DE
• Mathias Haake · Mannheim, DE
• Lothar Laupichler · Heidelberg, DE
• Bernhard Bockstiegel · Wasserburg am Inn, DE

Key dates

• Filing date: Dec 12, 2000
• Grant date: Apr 2, 2002
• Expiry date: Dec 12, 2020

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 at from 20 to 250° C. and hydrogen partial pressures of from 0.3 to 200 bar over fixed-bed supported palladium catalysts which are obtainable by heating the support material in the air, cooling, applying a palladium compound and, if required, additionally other metal ions for doping purposes, molding and processing to give monolithic catalyst elements, by a process in whichA) alkynes of 10 to 30 carbon atoms are used as starting compounds,B) the palladium compound and, if required, the other metal ions are applied to the support material by impregnation of the heated and cooled support material with a solution containing palladium salts and, if required, other metal ions and subsequent drying, andC) from 10 to 2000 ppm of carbon monoxide (CO) are added to the hydrogenation gas or a corresponding amount of CO is allowed to form in the liquid phase by slight decomposition of a compound which is added to the reaction mixture and eliminates CO under the reaction conditions.The process is particularly advantageous if the partial hydrogenation is carried out in a tube reactor by the trickle-bed or liquid pha…