Catalyst for purifying nitrogen oxides
US7160839B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Jan 10, 2002 |
| Grant date | Jan 9, 2007 |
| Priority date | — |
| Expiry date | Apr 24, 2022 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J37/0201
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A catalyst for purifying NOx is provided which efficiently decomposes and purify the NOx in an exhaust gas in an oxygen-excess atmosphere, excels in resistance to heat and in durability in a high temperature range under a high-temperature oxidizing atmosphere and in the presence of moisture and SOx, and manifests the catalytic activity over a wide range of temperature. It is a catalyst for purifying nitrogen oxides formed by coating (A) a catalytically active component comprising (A-a) iridium and (A-b) at least one element selected from the group consisting of the elements of Group IIIA and Group IVA in the Periodic Table of the Elements with (B) a refractory inorganic compound.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.