Production of high pore volume alumina spheres
US4140773A · kind A · utility
25Cited by
3References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 24, 1978 |
| Grant date | Feb 20, 1979 |
| Priority date | — |
| Expiry date | Feb 24, 1998 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01P2006/16
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
High macro-pore content spheres (>1000A) are produced by use of a rotating wheel, wherein dry alumina is dropped onto the wheel under a peptizing spray misted onto the wheel through an atomizing device. Compressive stresses normally encountered in procedures such as pelletizing are avoided, thereby preserving macro-pores. Size of spheres can be adjusted by altering, for example, the angle at which the wheel rotates.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.