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Exhaust gas-purifying catalyst
US10099204B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10099204-B2 |
| Application number | US-201715482961-A |
| Country | US |
| Kind code | B2 |
| Filing date | Apr 10, 2017 |
| Priority date | Apr 13, 2016 |
| Publication date | Oct 16, 2018 |
| Grant date | Oct 16, 2018 |
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Abstract
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An exhaust gas-purifying catalyst of the present invention comprises a substrate, and one or more catalytic layers provided on the substrate, wherein at least one of the catalytic layers (i) contains a precious metal, alumina, and an acidic oxide element, (ii) has a correlation coefficient ρ Al,AE of 0.70 or more, and (iii) has a correlation coefficient ρ PM,AE of 0.70 or more.
First claim
Opening claim text (preview).
What is claimed is: 1. An exhaust gas-purifying catalyst comprising: a substrate, and one or more catalytic layers provided on the substrate, wherein at least one of the catalytic layers consists of: a precious metal, an acidic oxide element, an alumina doped with the acidic oxide element, optionally at least one oxygen storage material selected from the group consisting of cerium oxide, zirconium oxide, a rare-earth oxide, a transition metal oxide, and a mixture or composite oxide thereof, optionally a rare-earth element, optionally zeolite, and optionally at least one binder selected from the group consisting of alumina, titania, and silica; the at least one of the catalytic layers has a correlation coefficient ρ Al,AE calculated by the following formula (1) of 0.70 or more; and the at least one of the catalytic layers has a correlation coefficient ρ PM,AE calculated by the following formula (7) of 0.70 or more, ρ Al , AE = C Al , AE σ Al σ AE ( 1 ) wherein C Al,AE , σ Al , and σ AE in the formula (1) are represented by the following formulae (2), (3) and (4), respectively: C Al , AE = 1 350 ∑ i = 1 350 ( I Al , i - I Al , av ) ( I AE , i - I AE , av ) ( 2 ) σ Al = 1 350 ∑ i = 1 350 ( I Al , i - I Al , av ) 2 ( 3 ) σ AE = 1 350 ∑ i = 1 350 ( I AE , i -
Assignees
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Classifications
with rare earths or actinides · CPC title
Silica and alumina · CPC title
Coatings comprising several layers · CPC title
Coating · CPC title
O2-storage component incorporated in the catalyst · CPC title
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- What does patent US10099204B2 cover?
- An exhaust gas-purifying catalyst of the present invention comprises a substrate, and one or more catalytic layers provided on the substrate, wherein at least one of the catalytic layers (i) contains a precious metal, alumina, and an acidic oxide element, (ii) has a correlation coefficient ρ Al,AE of 0.70 or more, and (iii) has a correlation coefficient ρ PM,AE of 0.70 or more.
- Who is the assignee on this patent?
- Cataler Corp
- What technology area does this patent fall under?
- Primary CPC classification B01J23/464. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue Oct 16 2018 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).