发明名称 |
COMPOSITION BASED ON OXIDES OF CERIUM, OF ZIRCONIUM AND OF ANOTHER RARE EARTH METAL WITH HIGH REDUCIBILITY, PREPARATION PROCESS AND USE IN THE FIELD OF CATALYSIS |
摘要 |
The composition of the invention is based on oxides of cerium, of zirconium and of at least one rare earth metal other than cerium, with a cerium oxide content of greater than 50% by weight and it has, after calcination at 1000° C. for 4 hours, a specific surface area of at least 20 m2/g and an amount of mobile oxygen between 200° C. and 400° C. of at least 0.8 ml O2/g. It is prepared by a process in which, in a reactor, a mixture of compounds of cerium, of zirconium and of the other rare earth metal is reacted continuously with a basic compound with a residence time of the reaction medium in the mixing zone of the reactor of at most 100 milliseconds; the precipitate is heated then brought into contact with a surfactant before being calcine. |
申请公布号 |
US2014205522(A1) |
申请公布日期 |
2014.07.24 |
申请号 |
US201214125639 |
申请日期 |
2012.06.13 |
申请人 |
Ifrah Simon;Rohart Emmanuel;Hernandez Julien;Horbez Dominique;Itani Lama |
发明人 |
Ifrah Simon;Rohart Emmanuel;Hernandez Julien;Horbez Dominique;Itani Lama |
分类号 |
B01J23/10;B01D53/94 |
主分类号 |
B01J23/10 |
代理机构 |
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代理人 |
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主权项 |
1. A composition based on oxides of cerium, zirconium and at least one rare-earth metal other than cerium, with a cerium oxide content of greater than 50% by mass, wherein the composition has, after calcination at 1000° C. for 4 hours, a specific surface area of at least 20 m2/g and an amount of mobile oxygen between 200° C. and 400° C. of at least 0.8 ml O2/g. |
地址 |
La Jarrie FR |