LEV-type zeolite and production method therefor
US9968917B2 · kind B2 · utility
1Cited by
1References
12Claims
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Key dates
| Filing date | Jun 9, 2014 |
| Grant date | May 15, 2018 |
| Priority date | — |
| Expiry date | Dec 31, 2034 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/12
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The present invention provides an LEV-type zeolite which is less likely than a conventional LEV-type zeolite to have reduced zeolite crystallinity even when exposed to high-temperature, high-humidity environments, particularly high-temperature, high-humidity environments of at least 700° C. The LEV-type zeolite has a molar ratio of silica to alumina of at least 20 and a molar ratio of silanol groups to silicon of at most 1.5×10−2. Such an LEV-type zeolite preferably has a silanol volume of at most 1.5×1020/g.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.