Three way catalyst comprising extruded solid body

US8603423B2 · kind B2 · utility

Assignee

• Johnson Matthey Public Limited Company · GB

Inventors

• Paul Joseph Andersen · Audubon, US
• Ralf Dotzel · Burgkunstadt, DE
• Kwangmo Koo · Conshohocken, US
• Rainer Leppelt · Lichtenfels, DE
• Jörg Werner Münch · Lichtenfels, DE
• Jeffery Scott Rieck · Wayne, US
• Hubert Schedel
• Duncan John William Winterborn · Cambridge, GB
• Todd Howard Ballinger · Audubon, US
• Julian Peter Cox · Wayne, US

Key dates

• Filing date: Feb 1, 2011
• Grant date: Dec 10, 2013
• Expiry date: Feb 1, 2031

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T29/49345
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A three way catalyst includes an extruded solid body having: 10-95% by weight of at least one binder/matrix component; 5-90% by weight of a zeolitic molecular sieve; and 0-80% by weight optionally stabilized ceria. The catalyst further includes at least one precious metal and optionally at least one non-precious metal. The at least one precious metal is carried in a coating layer on a surface of the extruded solid body; at least one metal is present throughout the extruded solid body and at least one precious metal is also carried in a coating layer on a surface of the extruded solid body; or at least one metal is present throughout the extruded solid body, is present in a higher concentration at a surface of the extruded solid body and at least one precious metal is also carried in a coating layer on the surface of the extruded solid body.