Catalyst precursor for an activated raney metal fixed-bed catalyst, an activated raney metal fixed-bed catalyst and a process for its preparation and use, and a method of hydrogenating organic compounds using said catalyst

US5536694A · kind A · utility

Assignee

• Degussa AG · DE

Inventors

• Peter Schuetz · Solingen, DE
• Roland Burmeister · Hanau, DE
• Bertrand Despeyroux · Hanau, DE
• Hans Moesinger · Rodenbach, DE
• Helmfried Krause · Rodenbach, DE
• Klaus Deller · Großkrotzenburg, DE

Key dates

• Filing date: Oct 13, 1994
• Grant date: Jul 16, 1996
• Expiry date: Oct 13, 2014

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01J2235/15
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

Shaped, activated Raney metal fixed-bed catalysts are obtained by molding a powder of at least one catalyst alloy, comprising at least one Raney process metal as catalytically active component and a leachable alloy component, and a powder of pure Raney process metal as binder with the addition of a shaping aid and pore-producer and subsequent calcination at temperatures below 850.degree. C. During calcination the shaping aid and pore-producer are burned away. Catalyst alloy powder and binder powder thereby sinter together to give a mechanically stable and porous molded item. This molded item thus consists of particles of catalyst alloys which are bonded by the powder of pure Raney process metal. It has no catalytically inactive, ceramic or glassy binder. The surface layer of the molded item is activated by leaching the leachable alloy component contained in the catalyst alloys with caustic soda solution.