发明授权
- 专利标题: Oxygen storage material based on cerium oxide, a process for its preparation and its use
- 专利标题(中): 基于氧化铈的储氧材料,其制备方法及其应用
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申请号: US09931162申请日: 2001-08-17
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公开(公告)号: US07238639B2公开(公告)日: 2007-07-03
- 发明人: Lothar Mussmann , Dieter Lindner , Martin Votsmeier , Egbert Lox , Thomas Kreuzer
- 申请人: Lothar Mussmann , Dieter Lindner , Martin Votsmeier , Egbert Lox , Thomas Kreuzer
- 申请人地址: DE Hanau-Wolfgang
- 专利权人: Umicore AG & Co. KG
- 当前专利权人: Umicore AG & Co. KG
- 当前专利权人地址: DE Hanau-Wolfgang
- 代理机构: Kalow & Springut LLP
- 优先权: EP00117898 20000819
- 主分类号: B01J23/00
- IPC分类号: B01J23/00
摘要:
An oxygen storage material based on cerium oxide with at least one other oxide of the metals silicon and zirconium, wherein the cerium oxide and the other oxides are present in the form of a mixed oxide. The material is obtainable in that hydroxidic precursors of the mixed oxide are first prepared in a manner known per se using a wet-chemical route, these precursors are optionally dried at temperatures between 80 and 300° C. and the dried precursors are then treated under a hydrogen-containing atmosphere at a temperature between 600 and 900° C. for a period of 1 to 10 hours. The reductive thermal treatment endows the material with a greatly improved dynamic behavior as compared with conventional calcination in air.