Process for producing stabilized alumina having enhanced resistance to loss of surface area at high temperatures
US5837634A · kind A · utility
27Cited by
10References
2Claims
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Key dates
| Filing date | Nov 12, 1992 |
| Grant date | Nov 17, 1998 |
| Priority date | — |
| Expiry date | Nov 12, 2012 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01P2006/12
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A process for preparing a stabilized alumina wherein an aqueous slurry of a precursor boehmite alumina is admixed with an effective amount of a stabilizer such as a water-soluble salt of a polyvalent metal cation of Groups IIA and IIIB of the periodic table, the slurry containing the alumina and the stabilizer being aged at a pH of from about 3 to about 9 and a temperature greater than about 70.degree. C. for a period of time sufficient to convert the greater portion of said alumina to a colloidal sol, the colloidal sol being recovered and calcined to produce a stabilized alumina.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.