Preparation of alumina having increased porosity
US5531976A · kind A · utility
10Cited by
5References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 22, 1995 |
| Grant date | Jul 2, 1996 |
| Priority date | — |
| Expiry date | Feb 22, 2015 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01P2006/17
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A process for making high porosity boehmite alumina comprising forming an aqueous dispersion of a boehmite alumina which has been obtained by hydrothermally treating an aqueous mixture of a precursor boehmite alumina at a pH of from about 5 to about 9 for a period of time sufficient to convert the greater portion of the precursor boehmite alumina to a colloidal sol, treating the dispersion of the hydrothermally treated alumina to form a viscous gel and subjecting the gel to sufficient shearing force for a sufficient period of time to increase the pore volume by at least 30% and the median pore radius by at least 20%.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.