发明公开
- 专利标题： COMPOSITION A BASE D'OXYDES DE ZIRCONIUM, DE CERIUM ET D'UNE AUTRE TERRE RARE A TEMPERATURE MAXIMALE DE REDUCTIBILITE REDUITE, PROCEDE DE PREPARATION ET UTILISATION DANS LE DOMAINE DE LA CATALYSE
- 专利标题（英）： Composition containing oxides of zirconium, cerium and another rare earth having reduced maximal reducibility temperature, and method for preparing and using same in the field of catalysis
- 专利标题（中）： 与减小的最大温度还原和方法对于运行KATALYSE生产和使用锆，铈和其他稀土氧化物组成
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申请号： EP11700821.9申请日： 2011-01-10
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公开(公告)号： EP2523907A1公开(公告)日： 2012-11-21
- 发明人: IFRAH, Simon , ROHART, Emmanuel , HERNANDEZ, Julien , DENAIRE, Stéphane
- 申请人： Rhodia Operations
- 申请人地址： 40 rue de la Haie Coq 93300 Aubervilliers FR
- 专利权人： Rhodia Operations
- 当前专利权人： Rhodia Operations
- 当前专利权人地址： 40 rue de la Haie Coq 93300 Aubervilliers FR
- 代理机构： Dubruc, Philippe
- 优先权： FR1000087 20100111
- 国际公布： WO2011083157 20110714
- 主分类号： C01G25/00
- IPC分类号： C01G25/00 ; B01D53/94 ; B01J21/06 ; B01J23/10 ; C01G25/02 ; B01D53/00 ; C01F17/00
摘要：
A composition is described that includes oxides of zirconium, cerium and another rare earth different from cerium, having a cerium oxide content not exceeding 50 wt % and, after calcination at 1000° C. for 6 hours, a maximal reducibility temperature not exceeding 500° C. and a specific surface of at least 45 m2/g. The composition can be prepared according to a method that includes continuously reacting a mixture that includes compounds of zirconium, cerium and another rare earth having a basic compound for a residence time not exceeding 100 milliseconds, wherein the precipitate is heated and contacted with a surfactant before calcination.
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