发明名称 |
Composite oxide and catalyst for purifying exhaust gas |
摘要 |
<p>A composite oxide includes agglomerated particles which have an average particle diameter of 20 mu m or less, which are composed of a plurality of metallic element oxides being in form of fine particles having an average diameter of 50 nm or less, and which have a surface and an inner portion whose metallic element distributions differ with each other. The characteristics of the respective metallic elements are exhibited maximally. Hence, it is extremely useful as a support for an exhaust gas purifying catalyst. The catalyst exhibits the activities which degrade less even after it is subjected to a sever durability, is good in terms of the heat and sulfur-poisoning resistance, and can efficiently purify the harmful components in exhaust gases. Moreover, it is possible to produce such a composite oxide and catalyst easily and stably by production processes disclosed herein. <IMAGE></p> |
申请公布号 |
EP1175935(B1) |
申请公布日期 |
2005.11.30 |
申请号 |
EP20010117621 |
申请日期 |
2001.07.24 |
申请人 |
KABUSHIKI KAISHA TOYOTA CHUO KENKYUSHO |
发明人 |
MORIKAWA, AKIRA;HATANAKA, MIHO;IMAGAWA, HARUO;SUDA, AKIHIKO;TAKAHASHI, NAOKI |
分类号 |
F01N3/10;B01D53/94;B01J21/06;B01J23/10;B01J23/46;B01J23/56;B01J23/63;B01J29/44;B01J32/00;B01J35/00;B01J35/02;B01J35/08;B01J37/02;B01J37/03;C01F7/02;C01G25/02;(IPC1-7):B01D53/94;C01G1/02 |
主分类号 |
F01N3/10 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|