Method for producing copper-containing CHA-type zeolite

Abstract

The objective is to provide a method for producing copper-containing CHA-type zeolite that does not require a post-processing step and yields a higher yield than conventional methods for crystallizing copper-containing CHA-type zeolite. [Solution] The present invention provides a method for producing a CHA-type zeolite, comprising the step of crystallizing a composition comprising a structure-directing agent source containing at least N,N,N-trialkylcyclohexylammonium cation, a polyamine source, a copper source, an alumina source, a silica source, a sodium source, and water, wherein the molar ratio of silica to alumina is 24 or less, the molar ratio of sodium to silica is 0.10 or more and 0.23 or less, and the molar ratio of N,N,N-trialkylcyclohexylammonium cation hydroxide to N,N,N-trialkylcyclohexylammonium cation is 0.7 or less, to obtain a crystalline product.

Claims

1. A CHA-type zeolite having a copper content greater than 0% by mass and 6.0% by mass or less, and a ratio of the area of ​​the TPR spectrum between 450°C and 800°C to the area of ​​the TPR spectrum between 100°C and 800°C to 0.05 or less to 0.

60.

2. The CHA-type zeolite according to claim 1, wherein the molar ratio of silica to alumina is 8 or more and 24 or less.

3. The CHA-type zeolite according to claim 2, wherein the molar ratio of silica to alumina is 10 or more and 22 or less.

4. The CHA-type zeolite according to claim 1 or 2, wherein the molar ratio of copper to alumina is greater than 0 and less than or equal to 1.

00.

5. The CHA-type zeolite according to claim 4, wherein the molar ratio of copper to alumina is 0.20 or more and 0.90 or less.

6. The CHA-type zeolite according to claim 1 or 2, wherein the molar ratio of silica to the structure-directing agent is 0.05 or less.

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