Compositions based on cerium oxide, zirconium oxide and, optionally, another rare earth oxide, having a specific raised surface at 1100° C, method for the production and use thereof as a catalyst
US8460626B2 · kind B2 · utility
5Cited by
26References
23Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 23, 2010 |
| Grant date | Jun 11, 2013 |
| Priority date | — |
| Expiry date | Jan 27, 2031 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/12
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The inventive composition, according to a first embodiment, consists essentially of a cerium oxide and a zirconium oxide in an atomic ratio Ce/Zr of at least 1. According to a second embodiment, said composition is based on cerium oxide, zirconium oxide with an atomic ratio Ce/Zr of at least 1 and at least one rare earth oxide other than cerium. After calcination at 1100° C., said composition has a specific surface of at least 9 m2/g in the second embodiment. The inventive composition can be used as a catalyst especially for the treatment of waste gases from internal combustion engines.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.