Preparation and use of catalysts comprising a mixture of tungsten oxide and silica supported on a boehmite-like surface
US4831007A · kind A · utility
13Cited by
12References
12Claims
0Family size
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Key dates
| Filing date | Dec 31, 1985 |
| Grant date | May 16, 1989 |
| Priority date | — |
| Expiry date | Dec 31, 2005 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J21/12
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Useful cracking catalysts and catalyst supports comprising a mixture of tungsten oxide and silica supported on a boehmite-like surface which, in turn, is supported on alumina are prepared by forming a composite of particles of (a) tungsten oxide, (b) silica and (c) boehmite and subjecting the composite to steaming at a temperature of at least about 500.degree. C. During the steaming, the tungsten oxide and silica react with the surface of the boehmite as the boehmite converts to alumina.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.