Low-silica chabazite zeolites with high acidity
US11040337B2 · kind B2 · utility
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24Claims
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Key dates
| Filing date | Apr 30, 2019 |
| Grant date | Jun 22, 2021 |
| Priority date | — |
| Expiry date | Apr 30, 2039 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF01N2610/02
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A microporous crystalline material having a molar silica to alumina ratio (SAR) ranging from 10 to 15 and a fraction of Al in the zeolite framework of 0.63 or greater is disclosed. A method of selective catalytic reduction of nitrogen oxides in exhaust gas that comprises contacting exhaust gases, typically in the presence of ammonia, urea, an ammonia generating compound, or a hydrocarbon compound, with an article comprising the disclosed microporous crystalline is also disclosed. Further, a method of making the disclosed microporous crystalline material is disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.