Novel ceric oxides and preparation thereof
US5064628A · kind A · utility
21Cited by
4References
49Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 22, 1990 |
| Grant date | Nov 12, 1991 |
| Priority date | — |
| Expiry date | Feb 22, 2010 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01P2006/16
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Provided is a ceric oxide having a specific surface of at least 85 m.sup.2 /g after calcination between 350.degree. and 550.degree. C., and being further characterized in that it has a pore volume of at least 0.15 cm.sup.3 /g and a median pore diameter greater than 50 .ANG.. The ceric oxide is prepared by destabilizing an aqueous colloidal dispersion of a cerium (IV) compound by the addition of base thereto, separating the precipitate which results and subjecting it to a heat treatment.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.