| 摘要 |
PROBLEM TO BE SOLVED: To provide a SAPO-47 which gives a catalyst having a high catalytic activity, especially a high catalytic activity at low temperatures and a method for producing the same.SOLUTION: There is provided a SAPO-47 having an average crystal particle diameter of less than 5 μm and an Si/Al molar ratio of less than 0.23. Additionally, in the SAPO-47, the amount of solid acid after a hydration treatment with respect to the amount of solid acid before a hydration treatment is preferably 40% or more. This SAPO-47 can be produced by a production method having a crystallization process in which a mixture containing alkylethylenediamine is crystallized. |
