Patent · US Active

Three-way-catalyst system

US9522360B2 · kind B2 · utility

9Cited by

26References

20Claims

0Family size

Assignee

UMICORE AG & CO. KG · DE

Inventors

Marcus Schmidt · Maumee, US
Joel Despres · Rodenbach, DE
Martin Roesch · Rodgau, DE
Raoul Klingmann · Alzenau, DE
Joerg-Michael Richter · Scheinfeld, DE

Key dates

Filing date	Jun 5, 2013
Grant date	Dec 20, 2016
Priority date	—
Expiry date	Jun 5, 2033

Classification

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

Abstract

The present invention describes a three-way-catalyst system comprising a first three-way catalyst on an inert catalyst support which is a double-layer catalyst comprising a first layer on the inert catalyst support, comprising active alumina, a cerium/zirconium mixed oxide and palladium and a second layer applied to the first layer and in direct contact with the exhaust gas to be purified, comprising active alumina and rhodium and being free of cerium and cerium containing materials and a second three-way-catalyst located upstream of the first three-way catalyst.

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