Title:
A compound oxide, the manufacturing method of that, and the catalyst for exhaust gas refining
Document Type and Number:
Japanese Patent JP6223354
Kind Code:
B2
Abstract:
A composite oxide and a catalyst for purifying exhaust gas using the same are provided, which oxide has excellent heat resistance, including that a large specific surface area is maintained even when the composite oxide is used in a high temperature environment, and that, even after calcination at 800° C. for 2 hours, no AECeO3 phase is detected and increase in CeO2 crystallite size is inhibited. The composite oxide contains, in terms of oxides, 60 to 98 mass % of a cerium-containing element, the cerium-containing element consisting of Ce and at least one element selected from rare earth elements other than Ce and including Y, Zr, and Si at 85:15 to 100:0 by mass, 1 to 20 mass % of an alkaline earth metal element, and 1 to 20 mass % aluminum in terms of AI2O3, wherein the composite oxide has properties of exhibiting a specific surface area of not smaller than 40 m2/g as measured by the BET method after calcination at 800° C. for 2 hours, and having no AECeO3 phase and having a CeO2 crystallite size in the (111) plane of not larger than 15 nm, as determined by X-ray diffraction after calcination at 800° C. for 2 hours.
More Like This:
| WO/1998/045027 | CATALYST COMPOSITION CONTAINING OXIDES OF CERIUM, ZIRCONIUM AND NEODYMIUM |
| WO/1994/016812 | CATALYST RECOVERY METHOD |
Inventors:
Roal, Emmanuel
Naotaka Otake
Naotaka Otake
Application Number:
JP2014547909A
Publication Date:
November 01, 2017
Filing Date:
December 18, 2012
Export Citation:
Assignee:
Rhodia Operations
International Classes:
B01J23/10; B01D53/86; B01J32/00; B01J37/03; C01F17/235; C01F17/241; C01G25/00; F01N3/10
Domestic Patent References:
| JP2002211908A | ||||
| JP10182155A | ||||
| JP2004337840A |
Foreign References:
| WO2011065416A1 | ||||
| WO2010134326A1 |
Attorney, Agent or Firm:
Sonoda Yoshitaka
Kobayashi Yoshinori
Kobayashi Yoshinori