Cha-type zeolite and method for producing the same
AssigneeTosoh Corporation
InventorsNaoto Nakazawa, Toyohiro Usui
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Abstract
Provided is at least one of a CHA-type zeolite having a greater amount of a paired aluminum structure than do CHA-type zeolites of the related art; a catalyst containing the CHA-type zeolite; and a method for producing these. A method for producing a CHA-type zeolite includes crystallizing a composition that contains an alumina source, a silica-alumina source, an alkali source, an organic structure-directing agent and water. Preferably, the composition is prepared by mixing the alumina source, the alkali source, the organic structure-directing agent and the water together and subsequently mixing the silica-alumina source therewith.
Claims11
A CHA zeolite having a paired aluminum ratio of 46.7% or greater, and a SiO2/Al2O3 ratio of from 15 to 60 .
A method for producing a CHA zeolite comprising crystallizing a composition that contains an alumina source, a silica-alumina source, an alkali source, an organic structure-directing agent source and water to obtain a CHA zeolite having a paired aluminum ratio of 46.7% or greater, and a SiO2/Al2O3 ratio of from 15 to 60.
Dependencies are inferred from the claim text.