Method for preparing pure, thermally stable and high surface area ceria
US7094383B2 · kind B2 · utility
10Cited by
7References
13Claims
0Family size
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Key dates
| Filing date | Dec 14, 2004 |
| Grant date | Aug 22, 2006 |
| Priority date | — |
| Expiry date | Apr 7, 2025 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01P2006/13
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method for the preparing pure, thermally stable and high surface area ceria is described, wherein the ceria maintains a surface area of 12 m2/g after calcination at 980° C. in air for 4 hours. In the method, an aqueous solution containing Ce3+, Mg2+, organic acid and organic polymer is prepared and then evaporated to obtain a gel. The gel is calcined to obtain a mixed oxide, and then MgO is leached from the mixed oxide with a solvent to obtain raw ceria. The raw ceria is then washed, filtered and dried to obtain a ceria product.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.