| 摘要 |
The purpose of the present invention is to provide a zeolite production method that can achieve, at low cost, a CHA-type zeolite that has high crystallinity and small particle diameter. The present invention is a method for producing a zeolite that has a CHA structure, that has a SiO2/Al2O3 composition ratio (SAR) of less than 15, and that has an average particle diameter of 0.5 μm or less. The present invention includes: a synthesis step for synthesizing a zeolite that has a CHA structure using a raw material composition that includes a Si source, an Al source, an alkali source, and a structure regulator; a micronizing step for micronizing the CHA-type zeolite that was obtained by means of the synthesis step; and a recrystallization step for mixing the CHA-type zeolite that was micronized as a result of the micronizing step with a solution that includes a Si source and an alkali source and then performing a hydration treatment. |
