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Exhaust gas-purifying catalyst
US10279338B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10279338-B2 |
| Application number | US-201615288740-A |
| Country | US |
| Kind code | B2 |
| Filing date | Oct 7, 2016 |
| Priority date | Oct 8, 2015 |
| Publication date | May 7, 2019 |
| Grant date | May 7, 2019 |
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- Title
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Abstract
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An exhaust gas-purifying catalyst includes a support and a catalytic metal supported thereby. The support includes a composite oxide represented by AO.xB2-αCαO3, wherein A represents at least one of an element having a valence of 1 and an element having a valence of 2, B represents an element having a valence of 3, C represents one or more elements selected from iridium, ruthenium, tantalum, niobium, molybdenum, and tungsten, x represents a numerical value of 1 to 6, and α represents a numerical value greater than 0 and less than 2. The catalytic metal includes one or more precious metals selected from rhodium, palladium, and platinum.
First claim
Opening claim text (preview).
What is claimed is: 1. An exhaust gas-purifying catalyst comprising: a support including a composite oxide having a composition represented by a general formula AO.xB 2-α C α O 3 , wherein A represents at least one of an element having a valence of 1 and an element having a valence of 2, B represents an element having a valence of 3, C represents iridium, x represents a numerical value within a range of 1 to 6, and α represents a numerical value greater than 0 and less than 2; and a catalytic metal supported by the support and including palladium, wherein the composite oxide includes at least one of hexaaluminate and a compound having a spinel structure. 2. The exhaust gas-purifying catalyst according to claim 1 , wherein a ratio of an amount of the element C contained in the composite oxide to a total amount of the element C contained in the exhaust gas-purifying catalyst is 3 atomic % or more. 3. The exhaust gas-purifying catalyst according to claim 1 , wherein the element A is one or more elements selected from group consisting of magnesium, calcium, strontium, and barium. 4. The exhaust gas-purifying catalyst according to claim 1 , wherein the element B is at least one of aluminum and iron. 5. The exhaust gas-purifying catalyst according to claim 1 , wherein the composite oxide includes at least one of a compound represented by the general formula wherein x is 1, and a compound represented by the general formula wherein x is 6. 6. The exhaust gas-purifying catalyst according to claim 1 , wherein α is within a range of 0.0004 to 0.2.
Assignees
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Classifications
Precipitation · CPC title
with chromium, molybdenum or tungsten · CPC title
Iron and noble metals · CPC title
Spinels · CPC title
- B01J23/002Primary
Mixed oxides other than spinels, e.g. perovskite · CPC title
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- What does patent US10279338B2 cover?
- An exhaust gas-purifying catalyst includes a support and a catalytic metal supported thereby. The support includes a composite oxide represented by AO.xB2-αCαO3, wherein A represents at least one of an element having a valence of 1 and an element having a valence of 2, B represents an element having a valence of 3, C represents one or more elements selected from iridium, ruthenium, tantalum, ni…
- Who is the assignee on this patent?
- Cataler Corp
- What technology area does this patent fall under?
- Primary CPC classification B01J23/002. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue May 07 2019 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).