Chabazite-type zeolite and method for producing same, copper loaded low-silica zeolite and NOx reductive removal catalyst containing the zeolite, and method of NOx reductive removal using this catalyst
US9889436B2 · kind B2 · utility
1Cited by
8References
13Claims
0Family size
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Key dates
| Filing date | Dec 22, 2011 |
| Grant date | Feb 13, 2018 |
| Priority date | — |
| Expiry date | Apr 7, 2033 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2982
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The chabazite-type zeolite of the present invention has a SiO2/Al2O3 molar ratio of less than 15, and an average particle size from 1.0 μm to 8.0 μm. The chabazite-type zeolite of the present invention has excellent durability and heat resistance, and the copper-loaded chabazite-type zeolite has an improved NOx reduction rate at low temperatures compared to conventional copper-loaded chabazite-type zeolite.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.