Exhaust gas-purifying composition
US10688480B2 · kind B2 · utility
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3References
8Claims
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Key dates
| Filing date | Jul 26, 2017 |
| Grant date | Jun 23, 2020 |
| Priority date | — |
| Expiry date | Jul 26, 2037 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF01N2370/04
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An exhaust gas purifying composition of the present invention contains zeolite that is BEA zeolite having an SiO2/Al2O3 molar ratio of greater than 25 and 600 or less and containing phosphorus. Furthermore, the exhaust gas purifying composition preferably contains zirconium in addition to phosphorus. Furthermore, the zeolite has an SiO2/Al2O3 molar ratio of from 30 to 150. The present invention provides an exhaust gas purifying composition having excellent HC adsorbability for exhaust gas purification in internal combustion engines such as gasoline engines.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.