发明名称 |
Crystalline ceric oxide sol and process for producing the same |
摘要 |
<p>There is provided a crystalline ceric oxide sol that is approximately monodisperse, and a process for producing the sol. <??>A sol comprising crystalline ceric oxide particles, in which the particles have particle size I (particle size converted from a specific surface area by gas adsorption method) ranging from 10 nm to 200 nm and a ratio of particle size II (particle size measured by dynamic light scattering method) to the particle size I ranging from 2 to 6. The sol is prepared by reacting a cerium (III) salt with an alkaline substance in an aqueous medium under an inert gas atmosphere to give a suspension of cerium (III) hydroxide, and immediately blowing oxygen or a gas containing oxygen into the suspension to give a sol comprising crystalline ceric oxide particles, and wet-grinding the resulting sol. The sol is also prepared by calcining cerium carbonate at a temperature of 300 to 1100 DEG C to give crystalline cerium oxide particles, and wet-grinding the resulting particles.</p> |
申请公布号 |
EP1234801(A3) |
申请公布日期 |
2003.12.03 |
申请号 |
EP20020004269 |
申请日期 |
2002.02.27 |
申请人 |
NISSAN CHEMICAL INDUSTRIES, LTD. |
发明人 |
OTA, ISAO;NISHIMURA, TOHRU;TANIMOTO, KENJI |
分类号 |
C01F17/00;C09G1/02;C09K3/14;(IPC1-7):C01F17/00 |
主分类号 |
C01F17/00 |
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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