Process for the preparation of mixed porous silica-alumina oxides in a spherical form
US5731261A · kind A · utility
17Cited by
17References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 6, 1996 |
| Grant date | Mar 24, 1998 |
| Priority date | — |
| Expiry date | May 6, 2016 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01P2006/16
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The present invention relates to a process for the preparation of mixed porous oxides with a spherical morphology and the oxides themselves thus obtained. This process consists in emulsifying, in an acid environment, a mixed sol with a dispersing medium, gelifying the microemulsion thus formed by contact with an alkaline solution and subjecting the gel obtained to thermal aging in the presence of the emulsifying liquid and gelation base of the sol or in a water medium, under controlled conditions of pH and temperature. The above mixed oxides can be widely applied as carriers for catalysts or as precursors of ceramic materials.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.