Extruded monolithic catalytic converter and manufacturing method

US7507684B2 · kind B2 · utility

Assignee

• Argillon GmbH · DE

Inventors

• Lothar Hofmann · Burgkunstadt, DE
• Jörg Werner Münch · Lichtenfels, DE
• Ralf Dotzel · Burgkunstadt, DE

Key dates

• Filing date: Dec 29, 2006
• Grant date: Mar 24, 2009
• Expiry date: Sep 3, 2027

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01J2229/42
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

The invention relates to an extruded solid catalyst body for breaking down nitrogen oxides in the presence of a reducing agent as well as to a process for manufacture of said body. The solid catalyst body has an active material that contains 60 to 87% by weight of an ion-exchanged zeolite containing at least one metal from the group containing Cu, Hf, La, Au, In, V, lanthanoids and transition metals of group VIII of the periodic system, more than 10 to 37% by weight of aluminum oxide and 2 to 10% by weight of inorganic fibers. The solid catalyst body, the active material of which contains a zeolite can be manufactured by extrusion and has a high degree of mechanical stability at a high catalytic activity.