Sulfonic acid-containing polymeric materials as amine sorbents
US-2017182475-A1 · Jun 29, 2017 · US
Gas sensor and method for producing same
US11638895B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11638895-B2 |
| Application number | US-201816489894-A |
| Country | US |
| Kind code | B2 |
| Filing date | Feb 19, 2018 |
| Priority date | Mar 2, 2017 |
| Publication date | May 2, 2023 |
| Grant date | May 2, 2023 |
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Abstract
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The filter of a gas sensor comprises an inorganic porous support supporting both an organic sulfonic acid compound including sulfo group (—SO3H) and a Lewis acid having at least a metal element of transitional metal elements, Al element, Ga element, In element, Ge element, and Sn element. The Lewis acid loaded in the inorganic porous support adsorbs low concentration siloxanes. The organic sulfonic acid compound including sulfo group polymerizes adsorbed siloxanes in the filter so as not to desorb from the filter.
First claim
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What is claimed is: 1. A gas sensor comprising a gas sensing element and a filter arranged at a position nearer to atmospheres to be detected than the gas sensing element, wherein said filter comprises an inorganic porous support supporting both an organic sulfonic acid compound including sulfo group (—SO3H) and a Lewis acid consisting of zirconia. 2. The gas sensor according to claim 1 , wherein said inorganic porous support includes at least a member selected from the group consisting of plate-like mesoporous silica, silica-gel other than mesoporous silica, or alumina. 3. The gas sensor according to claim 2 , wherein said inorganic porous support includes the silica-gel other than mesoporous silica. 4. The gas sensor according to claim 1 , wherein said filter is obtainable by fixing said zirconia in the inorganic porous support and then, loading said organic sulfonic acid compound in the inorganic porous support. 5. The gas sensor according to claim 1 , wherein said zirconia is solved in said inorganic porous support as a solid solution. 6. A method for producing a gas sensor comprising a gas sensing element and a filter arranged at a position nearer to atmospheres to be detected than the gas sensing element, comprising: a step for loading, in an inorganic porous support, at least a salt of Zr element, and then, thermally decomposing said salt to load an Lewis acid consisting of zirconia; and a subsequent step for loading, in said inorganic porous support, an organic sulfonic acid compound including sulfo group (—SO3H) to prepare a material of said filter.
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caused by burning or catalytic oxidation of surrounding material to be tested, e.g. of gas · CPC title
Organic compounds · CPC title
Coated, impregnated or composite adsorbents · CPC title
Organic adsorbents · CPC title
Silica or silicates · CPC title
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- What does patent US11638895B2 cover?
- The filter of a gas sensor comprises an inorganic porous support supporting both an organic sulfonic acid compound including sulfo group (—SO3H) and a Lewis acid having at least a metal element of transitional metal elements, Al element, Ga element, In element, Ge element, and Sn element. The Lewis acid loaded in the inorganic porous support adsorbs low concentration siloxanes. The organic sulf…
- Who is the assignee on this patent?
- Figaro Eng, Univ Osaka Public Corp
- What technology area does this patent fall under?
- Primary CPC classification B01D53/02. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue May 02 2023 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 3 related publications on this page (citations in our corpus or others sharing the same primary CPC).