Patent · US Expired

Catalyst for purifying exhaust gases from internal combustion engines and method of making the catalyst

US5073532A · kind A · utility

28Cited by

8References

18Claims

0Family size

Assignee

Degussa AG · DE

Inventors

Rainer Domesle · Alzenau, DE
Bernd Engler · Hanau, DE
Edgar Koberstein · Alzenau, DE
Peter J. Schubert · Carmel, US

Key dates

Filing date	Jul 30, 1990
Grant date	Dec 17, 1991
Priority date	—
Expiry date	Jul 30, 2010

Classification

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

Abstract

A catalyst is described made of active aluminum oxide with additives of CeO.sub.2, ZrO.sub.2, and Fe.sub.2 O.sub.3 and/or NiO as carrier and an active phase, applied thereon and consisting of platinum, palladium and/or rhodium, and a base metal, which is obtainable by impregnation of the additive-containing carrier with solutions of salts of the metals for the active phase, wherein the base metal of the active phase is cerium, by drying, and by heating to 250.degree. to 650.degree. C. The catalyst can be used for the oxidation and/or reduction of exhaust gases from internal combustion engines.

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