FAUJASITE TYPE ZEOLITE WITH HIGH PACKING DENSITY AND METHOD FOR PRODUCING THE SAME

To provide FAU type zeolite in which the packing density is increased by making the shape of primary particles closer to a spherical shape, and to provide a method for producing the same.SOLUTION: The FAU type zeolite has a primary particle sphericity represented by the following formula (1) of 0.60 or more, and is produced by a method which includes, for example, a precursor preparation step of preparing an aqueous mixture solution containing a Si source, an Al source and seed crystals, and a hydrothermal treatment step of growing FAU type zeolite crystals by hydrothermal treatment of the aqueous mixture solution, and which uses slow-dissolving silica particles as the Si source of the aqueous mixed solution containing the seed crystals. Sphericity X=area A measured by image analysis/area B of perfect circle whose diameter is the major diameter measured by image machine analysis [1]SELECTED DRAWING: Figure 2 【課題】一次粒子の形状を球状に近づけて充填密度を高めたＦＡＵ型ゼオライトとその製造方法を提供する。【解決手段】次式[１]によって示される一次粒子の球形度が０.６０以上であるＦＡＵ型ゼオライトであり、例えば、Ｓｉ源、Ａｌ源、および種結晶を含む水性混合液を調製する前駆体調製工程と、前記水性混合液を水熱処理してＦＡＵ型ゼオライト結晶を成長させる水熱処理工程を備え、上記種結晶を含む水性混合溶液のＳｉ源として遅溶解性シリカ粒子を用いる方法によって製造されるＦＡＵ型ゼオライト。球形度Ｘ＝画像解析による測定面積Ａ／画像機解析によって測定した長径を直径とした真円の面積Ｂ ・・・[１]【選択図】図２