Invention Grant
- Patent Title: Ceria-zirconia-based composite oxide and method for producing same, and exhaust gas purification catalyst including ceria-zirconia-based composite oxide
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Application No.: US14910378Application Date: 2014-08-05
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Publication No.: US10065179B2Publication Date: 2018-09-04
- Inventor: Akira Morikawa , Kae Konishi , Toshitaka Tanabe , Akihiko Suda , Masahide Miura , Isao Chinzei , Hiromasa Suzuki , Akiya Chiba , Kosuke Iizuka
- Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA , CATALER CORPORATION
- Applicant Address: JP Toyota-shi JP Kakegawa-shi, Shizuoka-ken
- Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA,CATALER CORPORATION
- Current Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA,CATALER CORPORATION
- Current Assignee Address: JP Toyota-shi JP Kakegawa-shi, Shizuoka-ken
- Agency: Hunton Andrews Kurth LLP
- Priority: JP2013-166336 20130809
- International Application: PCT/IB2014/001462 WO 20140805
- International Announcement: WO2015/019156 WO 20150212
- Main IPC: B01J23/10
- IPC: B01J23/10 ; B01J37/00 ; B01J37/12 ; B01J37/14 ; B01J37/03 ; B01J23/00 ; B01D53/94 ; B01J37/16 ; B01J23/63 ; B01J35/00 ; B01J35/02 ; C04B35/626 ; C04B35/488 ; C01G25/00 ; C04B35/50 ; B01J37/08
Abstract:
A ceria-zirconia-based composite oxide containing a composite oxide of ceria and zirconia is provided, in which primary particles having a particle diameter of 1.5 to 4.5 μm account for, on a particle number basis, at least 50% of all primary particles in the ceria-zirconia-based composite oxide, and the molar ratio of cerium to zirconium in the ceria-zirconia-based composite oxide is between 43:57 and 55:45.
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