Patent · US Active

Three-way catalyst having an upstream single-layer catalyst

US8968690B2 · kind B2 · utility

20Cited by

56References

15Claims

0Family size

Assignee

UMICORE AG & CO. KG · DE

Inventors

John G. Nunan · Tulsa, US
Raoul Klingmann · Alzenau, DE
Ryan J. Andersen · Belmont, US
Davion Onuga Clark · Auburn Hills, US
David Moser · Sterling Heights, US

Key dates

Filing date	Nov 21, 2011
Grant date	Mar 3, 2015
Priority date	—
Expiry date	Nov 21, 2031

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10S502/52713
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

Disclosed herein is a layered three-way catalytic system being separated in a front and a rear portion having the capability of simultaneously catalyzing the oxidation of hydrocarbons and carbon monoxide and the reduction of nitrogen oxides. Provided is a catalyst composite comprising a single front catalytic layer and two rear catalytic layers in conjunction with a substrate, where the single font layer and the rear bottom layer comprise a Pd component, the rear top layer comprises a Rh component, and the rear bottom layer is substantially free of an oxygen storage component (OSC).

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