Title:
β-TYPE ZEOLITE AND EXHAUST GAS-PURIFYING COMPOSITION
Document Type and Number:
WIPO Patent Application WO/2022/264758
Kind Code:
A1
Abstract:
Provided are a β-type zeolite that maintains high crystallinity and improved heat resistance even in a severe thermal environment, and an exhaust gas-purifying composition. An 27Al MAS NMR spectrum of the β-type zeolite shows peaks that are separated into four peaks including: peak 1 having a chemical shift value of the peak apex of 55.4 to 59.0 ppm inclusive; peak 2 having a chemical shift value of the peak apex of 50.0 to 55.4 ppm inclusive; peak 3 having a chemical shift value of the peak apex of 30.0 to 50.0 ppm inclusive; and peak 4 having a chemical shift value of the peak apex of -15.0 to -5.0 ppm inclusive. When the first peak area ratio of the peak area A2 of peak 1 to the sum of the peak areas of the four peaks A1 is referred to A (A2/A1), then A is 0.05 or greater. The β-type zeolite contains phosphorus.
Inventors:
HAYASHI KATSUHIKO (JP)
OHASHI RYUTARO (JP)
GOTO HIDEKAZU (JP)
OGASAWARA MASATAKA (JP)
KATO SUMIO (JP)
SAITO KANJI (JP)
OHASHI RYUTARO (JP)
GOTO HIDEKAZU (JP)
OGASAWARA MASATAKA (JP)
KATO SUMIO (JP)
SAITO KANJI (JP)
Application Number:
PCT/JP2022/021231
Publication Date:
December 22, 2022
Filing Date:
May 24, 2022
Export Citation:
Assignee:
MITSUI MINING & SMELTING CO LTD (JP)
International Classes:
C01B39/46; B01D53/86; B01J20/18; B01J20/28; B01J29/70
Domestic Patent References:
| WO2021002322A1 | 2021-01-07 | |||
| WO2021044687A1 | 2021-03-11 | |||
| WO2019082990A1 | 2019-05-02 |
Foreign References:
| JP2015000828A | 2015-01-05 |
Attorney, Agent or Firm:
ICHIZAWA, KAWADA & ASSOCIATES (JP)
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