Catalyst for exhaust gas purification
US6797663B2 · kind B2 · utility
4Cited by
11References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 25, 2002 |
| Grant date | Sep 28, 2004 |
| Priority date | — |
| Expiry date | Nov 2, 2022 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J37/0246
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An exhaust gas clean-up catalyst having a catalytic layer which contains, as an occluding agent, at least one (potassium and/or the like) chosen from a group consisting of alkaline metals and alkaline earth metals. The catalytic layer consists of a first catalytic layer (20) which contains the occluding agent (potassium and/or the like) and an acid material (30) having a high affinity to the occluding agent, and a second catalytic layer (40) which contains the occluding agent and does not contain the acid material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.