Title:
EXHAUST GAS PURIFYING CATALYST AND PRODUCTION METHOD THEREFOR, AND EXHAUST GAS PURIFICATION DEVICE USING SAME
Document Type and Number:
WIPO Patent Application WO/2017/163916
Kind Code:
A1
Abstract:
Provided is a technology that enables rhodium to be kept in a high catalytic activity state. The present invention relates to an exhaust gas purifying catalyst (10) having first carrier particles (1), second carrier particles (2), and precious metal catalyst particles (3) supported on the first and second carrier particles, wherein: the first carrier particles (1) contain ceria, zirconia, and a rare-earth oxide other than ceria; the second carrier particles (2) contain a rare-earth oxide other than ceria, and may contain ceria and zirconia; the contained proportion of ceria and zirconia in the first carrier particles (1) is higher than the contained proportion of ceria and zirconia in the second carrier particles (2); the contained proportion of the rare-earth oxide in the second carrier particles (2) is higher than the contained proportion of the rare-earth oxide in the first carrier particles (1); and the contained proportion of ceria in the first carrier particles (1) is 45 wt% or less, while the precious metal catalyst particles (3) include rhodium particles.
Inventors:
SAKURADA YU (JP)
HARADA TAKAHIRO (JP)
NAKASHIMA RYOTA (JP)
HARADA TAKAHIRO (JP)
NAKASHIMA RYOTA (JP)
Application Number:
PCT/JP2017/009583
Publication Date:
September 28, 2017
Filing Date:
March 09, 2017
Export Citation:
Assignee:
CATALER CORP (JP)
International Classes:
B01J23/63; B01D53/94; B01J32/00; B01J37/04; B01J37/08
Domestic Patent References:
| WO2011010700A1 | 2011-01-27 |
Foreign References:
| JP2015525123A | 2015-09-03 | |||
| JP2011183317A | 2011-09-22 | |||
| JP2002518171A | 2002-06-25 | |||
| JP2006346661A | 2006-12-28 | |||
| JP2011062683A | 2011-03-31 |
Other References:
See also references of EP 3434362A4
Attorney, Agent or Firm:
AOKI, Atsushi et al. (JP)
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