Dealumination of faujasite-type zeolites using ion exchange resins
US4512961A · kind A · utility
10Cited by
3References
3Claims
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Key dates
| Filing date | Aug 22, 1983 |
| Grant date | Apr 23, 1985 |
| Priority date | — |
| Expiry date | Aug 22, 2003 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S423/21
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Faujasite-type zeolites of high catalytic activity, low coke-forming property and stable crystalline structure are prepared by using a combination of hydrothermal treatment and ion exchange resin removal of aluminum from the crystalline structure of the zeolites. The process allows for a substantial increase of the silica-to-alumina ratio in the zeolite without detrimentally affecting the strength of the structure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.