Porous aluminas and their preparation
US4729890A · kind A · utility
5Cited by
14References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 26, 1984 |
| Grant date | Mar 8, 1988 |
| Priority date | — |
| Expiry date | Mar 26, 2004 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01P2006/16
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
An alumina comprising particles which are aggregates or agglomerates of primary particles in which the internal porosity is provided by micropores of predetermined average width within the range 4 to 20 Angstroms and in which the pore width over the majority of the pores is within 1 Angstrom of the predetermined value, and a method for producing such an alumina by heating a particulate hydrous alumina to dehydrate it under an atmosphere in which the partial pressure of water vapor is maintained essentially constant at a predetermined value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.