Patent · US Active

Exhaust gas cleaning catalyst with an axially varying precious metal concentration and processes for making the catalyst

US7906454B2 · kind B2 · utility

4Cited by

7References

19Claims

0Family size

Assignee

UMICORE AG & CO. KG · DE

Inventors

Anke Wolf · Rio de Janeiro, BR
Dieter Lindner · Hanau, DE
Matthias Feger · Darmstadt, DE
Martin Roesch · Rodgau, DE
Egbert Lox · Hanau, DE
Thomas Kreuzer · Karben, DE

Key dates

Filing date	Jan 18, 2005
Grant date	Mar 15, 2011
Priority date	—
Expiry date	Sep 2, 2027

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/1234
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

The present invention relates to an exhaust gas cleaning catalyst comprising on a honeycomb carrier a catalytic coating. Said honeycomb carrier has an upstream end and a downstream end and a plurality of flow channels are running from the upstream end to the downstream end. The catalytic coating comprises catalytically active precious metal components of which at least one component exhibits a concentration profile along the honeycomb carrier starting with a low concentration at the upstream end which increases along the flow channels up to a maximum value and then decreases again to the downstream end.

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