发明名称 |
Composition based on zirconium oxide and on cerium oxide preparation process and use |
摘要 |
The invention relates to a composition based on zirconium oxide and comprising cerium oxide which has a specific surface of at least 30 m2/g after calcination for 6 hours at 900° C. and which is provided in the form of a pure solid solution of cerium oxide in zirconium oxide. According to another embodiment, this composition can additionally comprise a doping element and can exhibit a specific surface of at least 25 m2g after calcination for 6 hours at 1000° C. A process for the preparation of these compositions comprises the following stages:a mixture is prepared, in liquid medium, containing a zirconium compound and a cerium(IV) compound;the said mixture is heated at a temperature greater than 100° C.;the reaction mixture obtained on conclusion of the heating is brought to a basic pH;the precipitate thus obtained is recovered;the said precipitate is calcined;the doping element being, if appropriate, added either to the starting mixture in liquid medium or to the reaction mixture obtained on conclusion of the heating. |
申请公布号 |
ZA9605464(B) |
申请公布日期 |
1997.04.24 |
申请号 |
ZA19960005464 |
申请日期 |
1996.06.27 |
申请人 |
RHONE-POULENC CHIMIE, A LEGAL BODY ORGANISED AND EXISTING UNDER THE LAWS OF FRANCE |
发明人 |
MARYLINE AUBERT;THIERRY BIRCHEM;GILBERT BLANCHARD;OLIVIER TOURET |
分类号 |
B01D53/94;B01J23/10;B01J35/10;B01J37/03;B01J37/04;C01G25/00;C01G25/02 |
主分类号 |
B01D53/94 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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