High specific surface area mixed oxide of cerium and of another rare earth, preparation method and use in catalysis
US8435919B2 · kind B2 · utility
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13References
17Claims
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Key dates
| Filing date | Jun 20, 2008 |
| Grant date | May 7, 2013 |
| Priority date | — |
| Expiry date | Dec 25, 2028 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/12
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The mixed oxide of the invention mainly consists of cerium oxide and of at least one oxide of another rare earth. It has a specific surface area of at least 20 m2/g after calcining at 1000° C. for 5 hours. It is obtained by forming a liquid medium comprising a cerium compound; by heating this medium; by adding to the precipitate obtained a compound of the other rare earth, by heating the medium thus obtained and by bringing its pH to a basic value and by calcining the precipitate. The mixed oxide may be used as a catalyst support.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.