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COMPOSITION BASED ON OXIDES OF CERIUM, OF ZIRCONIUM AND OF ANOTHER RARE EARTH METAL WITH HIGH REDUC 发明申请

2023-12-03 2260 1201K 0

专利信息

申请日期 2025-07-18 申请号 US14125639
公开(公告)号 US20140205522A1 公开(公告)日 2014-07-24
公开国别 US 申请人省市代码 全国
申请人 Simon Ifrah; Emmanuel Rohart; Julien Hernandez; Dominique Horbez; Lama Itani
简介 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.


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