β-zeolite molecular sieve absorbent
AssigneeNGK Insulators, Ltd.
InventorsAzuma Yamamoto, Akira Takahashi, Takuya Hiramatsu
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Abstract
The present invention provies an adsorbent which, as compared with an adsorbent comprising a zeolite (an aluminosilicate) of at least about equal Si/(Fe+Al) molar ratio (Fe is substantially absent), has high heat resistance and high hydrothermal resistance and can maintain adsorption capability even when exposed to high temperatures. This adsorbent comprises a β-silicate molecular sieve containing at least Fe besides H, O and Si and, when Al is contained, containing Fe in a molar amount at least equal to that of Al.
Claims2
An adsorbent comprising a β-zeolite molecular sieve, which β-zeolite consists essentially of Fe, H, O, Si, and Al with the Fe in a molar amount at least equal to that of Al and the molar ratio of Si/Al being 80 or more.
Dependencies are inferred from the claim text.