Multilayered catalyst compositions

US7754171B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Shau-Lin F. Chen · Piscataway, US
• Knut Wassermann · Princeton, US
• Stephan Siemund · Pattensen, DE
• Tian Luo · Piscataway, US
• Torsten Neubauer · Langenhagen, DE
• Jin Sakakibara · Edison, US
• Harold Rabinowitz · Upper Montclair, US

Key dates

• Filing date: Jan 9, 2008
• Grant date: Jul 13, 2010
• Expiry date: May 28, 2028

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02T10/12
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A multilayered, three-way conversion catalyst having the capability of simultaneously catalyzing the oxidation of hydrocarbons and carbon monoxide and the reduction of nitrogen oxides is disclosed. Provided is a catalytic material of at least four layers in conjunction with a carrier, where each of the layers includes a support, at least three layers comprise a precious metal component, and at least one layer comprises an oxygen storage component (OSC). The catalytic material can further comprise a fifth layer, where at least four layers comprise a precious metal component, at least one layer comprises an oxygen storage component, and at least one layer is substantially free of an oxygen storage component.