Catalysts comprising silica supported on a boehmite-like surface, their preparation and use
US4708945A · kind A · utility
37Cited by
12References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 31, 1985 |
| Grant date | Nov 24, 1987 |
| Priority date | — |
| Expiry date | Dec 31, 2005 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10G11/04
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Useful cracking catalysts and catalyst supports comprising silica supported on a boehmite-like surface are prepared by compositing particles of silica or hydrated silica with particles of porous boehmite and subjecting the resulting composite to high temperature steaming at a temperature of at least about 600.degree. C. for a time sufficient to disperse at least a portion of the silica over the boehmite surface as the boehmite converts to .gamma.-Al.sub.2 O.sub.3. The silica wets, spreads out and reacts with the surface hydroxyl groups of the transforming boehmite.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.