Exhaust gas purification catalyst
US10071368B2 · kind B2 · utility
11Cited by
10References
11Claims
0Family size
Assignee
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Key dates
| Filing date | Feb 16, 2016 |
| Grant date | Sep 11, 2018 |
| Priority date | — |
| Expiry date | Feb 16, 2036 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF01N2510/0684
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An exhaust gas purification catalyst capable of stably maintaining and exhibiting excellent catalytic performance includes a wall-flow-type substrate, a first catalytic layer and a second catalytic layer. The first catalytic layer is provided to an internal portion of a partition wall in contact with an entrance cell. The second catalytic layer is provided to an internal portion of a partition wall in contact with an exit cell. The ratio (D2/D1) of the coating density D2 of the second catalytic layer to the coating density D1 of the first catalytic layer is 1.01 to 1.4.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.