Catalytic conversion over dehydroxylated zeolite
US4724270A · kind A · utility
9Cited by
5References
9Claims
0Family size
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Key dates
| Filing date | Dec 19, 1986 |
| Grant date | Feb 9, 1988 |
| Priority date | — |
| Expiry date | Dec 19, 2006 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C2529/40
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The acidity of a zeolite catalyst is reduced by calcination in an essentially water-free atmosphere at temperatures above 700.degree. C., preferably from 725.degree. to 800.degree. C., to reduce the alpha value to less than 10 percent of its original value. The low acidity catalysts produced in this way may be used for conversions requiring low acidity, shape selective catalysis, including conversion of oxygenates to hydrocarbons. The calcined, low acidity catalysts exhibit improved selectivity to certain desired products.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.