Oxidation catalyst for internal combustion engines

US6077489A · kind A · utility

Assignee

• Degussa-Huels AG · DE

Inventors

• Harald Klein · Bessenbach, DE
• Hans Van Den Tillaart · Alzenau, DE
• Egbert Lox · Hanau, DE
• Thomas Kreuzer · Karben, DE
• Stephan Eckhoff · Alzenau, DE

Key dates

• Filing date: Dec 16, 1998
• Grant date: Jun 20, 2000
• Expiry date: Dec 16, 2018

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S502/50
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

An oxidation catalyst for internal combustion engines which contains platinum on a finely divided support material and containing lead as a promoter. The catalytic activity of the oxidation catalyst can be increased greatly by promoting the catalyst with lead at a molar ratio of lead to platinum of 2:1. The light-off temperatures of the promoted catalyst are well below the corresponding temperatures for a conventional, lead-free catalyst.