Three way catalyst comprising extruded solid body

US9040003B2 · 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: Nov 13, 2013
• Grant date: May 26, 2015
• Expiry date: Nov 13, 2033

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 by weight: 10-100% of at least one binder/matrix component; 5-90% of a zeolitic molecular sieve, a non-zeolitic molecular sieve or a mixture of any two or more thereof; and 0-80% optionally stabilised ceria. The catalyst also includes at least one precious metal and optionally at least one non-precious metal, wherein: (i) the at least one precious metal is carried in one or more coating layer(s) on the body surface; (ii) at least one metal is present throughout the body and at least one precious metal is carried in one or more coating layer(s) on a body surface; or (iii) at least one metal is present throughout the body, is present in a higher concentration at a body surface, and at least one precious metal is carried in one or more coating layer(s) on the body surface.