PD/AU shell catalyst containing HFO2, processes for the preparation and use thereof

US8466082B2 · kind B2 · utility

Assignee

• Sued-Chemie IP GmbH & Co. KG · DE

Inventors

• Alfred Hagemeyer · Sunnyvale, US
• Gerhard Mestl · Munich, DE
• Peter Scheck · Gilching, DE

Key dates

• Filing date: May 30, 2008
• Grant date: Jun 18, 2013
• Expiry date: May 6, 2029

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01J37/0036
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A shell catalyst for the preparation of vinyl acetate monomer, comprising an oxidic porous catalyst support with an outer shell, containing metallic Pd and Au, wherein the framework structure of the porous catalyst support contains hafnium oxide units. This shell catalyst is suitable for the preparation of VAM and is characterized by a relatively high activity and VAM selectivity and maintains this activity and selectivity over relatively long service lives. Also, processes for the preparation and use of the shell catalyst.