Exhaust gas purifying composition and production method therefor
US12330133B2 · kind B2 · utility
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9Claims
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Key dates
| Filing date | Jun 5, 2020 |
| Grant date | Jun 17, 2025 |
| Priority date | — |
| Expiry date | Jan 15, 2042 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J2229/186
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An exhaust gas purifying composition that contains a phosphorus-containing BEA-type zeolite and has further improved heat resistance; and a production method therefor are provided. The exhaust gas purifying composition contains a phosphorus-containing BEA-type zeolite, wherein the phosphorus-containing BEA-type zeolite has a pore volume ratio (V2/V1) of a micropore volume V2 having a pore diameter in a range of 2 nm or less, as measured by a SF method, to a mesopore volume V1 having a pore diameter in a range of 2 nm or more and 100 nm or less, as measured by a BJH method, of 2.0 or more.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.