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Carrier for internal-combustion engine exhaust gas purification catalyst
US9669389B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9669389-B2 |
| Application number | US-201114110295-A |
| Country | US |
| Kind code | B2 |
| Filing date | Oct 20, 2011 |
| Priority date | Apr 22, 2011 |
| Publication date | Jun 6, 2017 |
| Grant date | Jun 6, 2017 |
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Abstract
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An internal combustion engine exhaust gas purifying catalyst carrier has a core body formed of a CeO 2 —ZrO 2 solid solution or a CeO 2 —ZrO 2 —La 2 O 2 solid solution, and CeO 2 supported on the surface of the core body, wherein the core body has a CeO 2 content of 5 to 35 mass % and an La 2 O 2 content of 0 to 10 mass %, on the basis of the mass of the carrier, and the amount of CeO 2 supported on the core body is 5 to 17 mass %, on the basis of the mass of the carrier.
First claim
Opening claim text (preview).
The invention claimed is: 1. An internal combustion engine exhaust gas purifying catalyst carrier comprising: a core body formed of a CeO 2 —ZrO 2 —La 2 O 3 solid solution, and CeO 2 supported on the surface of the core body, wherein the core body has a CeO 2 content of 10 to 30[M] mass % and an La 2 O 3 content of 1 to 10 mass %, and the amount of CeO 2 supported on the core body is 5 to 10 mass %, wherein the sum of the amount of CeO 2 in the core body and the amount of CeO 2 supported on the surface of the core body is to 40 mass %, each mass % being based on the combined mass of the CeO 2 —ZrO 2 —La 2 O 3 core body and supported CeO 2 . 2. The internal combustion engine exhaust gas purifying catalyst carrier according to claim 1 , wherein the core body has an La 2 O 3 content of 2 to 8 mass %, on the basis of the mass of the carrier. 3. The internal combustion engine exhaust gas purifying catalyst carrier according to claim 1 , wherein the ratio of specific surface area (BET) of an aged carrier that has been aged in air at 1000° C. for 25 hours to specific surface area (BET) of a fresh non-aged carrier is between 44.3% and 72.6%.
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Specific surface · CPC title
Oxygen · CPC title
Lanthanum · CPC title
Cerium · CPC title
of particles · CPC title
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- What does patent US9669389B2 cover?
- An internal combustion engine exhaust gas purifying catalyst carrier has a core body formed of a CeO 2 —ZrO 2 solid solution or a CeO 2 —ZrO 2 —La 2 O 2 solid solution, and CeO 2 supported on the surface of the core body, wherein the core body has a CeO 2 content of 5 to 35 mass % and an La 2 O 2 content of 0 to 10 mass %, on the basis of the mass of the carrier, and the amount of CeO 2 s…
- Who is the assignee on this patent?
- Nakahara Yunosuke, Wakabayashi Takashi, Imada Yasunori, and 6 more
- What technology area does this patent fall under?
- Primary CPC classification B01J23/10. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue Jun 06 2017 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).