发明名称 |
Catalyst support particle, production process thereof and exhaust gas purifying catalyst |
摘要 |
A catalyst support particle 10 is disclosed, wherein the particle comprises a zirconia-based metal oxide particle 1, and rare earth oxide-enriched areas 2 dotted on the surface thereof. A production process of a catalyst support particle is disclosed, wherein the process comprises (a) providing a colloidal solution containing a colloidal particle of rare earth hydroxide or oxide, (b) adding a zirconia-based metal oxide particle to the colloidal solution to cause the colloidal particle to be adsorbed and loaded on the surface of the zirconia-based metal oxide particle, and (c) drying and firing the zirconia-based metal oxide particle having the colloidal particle adsorbed and loaded thereon. |
申请公布号 |
US8999886(B2) |
申请公布日期 |
2015.04.07 |
申请号 |
US200712373150 |
申请日期 |
2007.07.03 |
申请人 |
Toyota Jidosha Kabushiki Kaisha |
发明人 |
Takeshima Shinichi;Kiyoyama Ryo |
分类号 |
B01J21/04;B01J23/02;B01J23/00;B01J23/10;B01D53/94;B01J23/63;B01J37/02;B01J21/06;B01J35/00;B01J37/03 |
主分类号 |
B01J21/04 |
代理机构 |
Finnegan, Henderson, Farabow, Garrett & Dunner, LLP |
代理人 |
Finnegan, Henderson, Farabow, Garrett & Dunner, LLP |
主权项 |
1. A catalyst support particle, comprising:
a zirconia-based metal oxide particle, and rare earth oxide-enriched areas dotted on the surface thereof, wherein a molar fraction of a rare earth element in the rare earth oxide-enriched areas is from 0.5 to 10 mol % based on all metal elements in said catalyst support particle, wherein the rare earth oxide is an oxide of a rare earth metal element selected from the group consisting of lanthanum, neodymium, and samarium, and wherein the catalyst support particle has a BET specific surface area of 14 to 100 m2/g. |
地址 |
Toyota-shi, Aichi JP |