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|1. (WO2018079569) CHABAZITE TYPE ZEOLITE FOR SUBSTRATE COATING|
|Applicants:||JGC CATALYSTS AND CHEMICALS LTD.
|Title:||CHABAZITE TYPE ZEOLITE FOR SUBSTRATE COATING|
The purpose of the present invention is to provide a chabazite type zeolite which is not easily separated from a substrate coated therewith even if the substrate is a honeycomb body or the like, while exhibiting excellent durability. The present invention relates to a chabazite type zeolite for substrate coating, which satisfies the following requirements (i) to (iv). (i) The chabazite type zeolite contains Si and Al. (ii) The chabazite type zeolite has an SiO2/Al2O3 molar ratio within the range of 5 < SiO2/Al2O3 < 10. (iii) The average crystal size of the chabazite type zeolite is within the range of 0.05 μm < (average crystal size) < 1 μm. (iv) In the spectrum as measured by 27Al-NMR, the ratio of the area (ANFA) of peaks ascribed to Al other than 4-coordinated Al to the area (ATotal) of all the peaks in the spectrum, namely (ANFA/ATotal) is within the range of 20% ≤ (ANFA/ATotal) ≤ 70%.