Patent · US Active

Catalyst for reduction of nitrogen oxides

US10428708B2 · kind B2 · utility

8Cited by

2References

19Claims

0Family size

Assignee

UMICORE AG & CO. KG · DE

Inventors

Thomas UTSCHIG · Frankfurt am Main, DE
Ruediger Hoyer · Alzenau, DE
Elena Mueller · Pfungstadt, DE

Key dates

Filing date	Aug 4, 2015
Grant date	Oct 1, 2019
Priority date	—
Expiry date	Sep 19, 2035

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF01N2510/0684
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

The present invention relates to a nitrogen oxide storage catalyst composed of at least two catalytically active washcoat layers on a support body, wherein a lower washcoat layer A comprises cerium oxide, an alkaline earth metal compound and/or an alkali metal compound, and platinum and palladium, and an upper washcoat layer B disposed atop the washcoat layer A comprises cerium oxide, platinum and palladium, and no alkali metal or alkaline earth metal compound, and to a method of converting NOx in exhaust gases from motor vehicles which are operated with lean-burn engines.

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