Patent · US Expired

Platinum-free three-way catalyst

US5013705A · kind A · utility

23Cited by

4References

14Claims

0Family size

Assignee

Degussa AG · DE

Inventors

Edgar Koberstein · Alzenau, DE
Bernd Engler · Hanau, DE
Rainer Domesle · Alzenau, DE
Herbert Voelker · Hanau, DE

Key dates

Filing date	Oct 28, 1988
Grant date	May 7, 1991
Priority date	—
Expiry date	Oct 28, 2008

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02T10/12
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

The invention is a three-way catalyst of active aluminum oxide, palladium, rhodium and cerium dioxide. If Al.sub.2 O.sub.3 is present as bulk carrier, the catalyst contains 5-20% by weight CeO.sub.2 and if Al.sub.2 O.sub.3 is present as a coating on a honeycombed, inert carrier, it contains 25-50% by weight CeO.sub.2.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.