Abstract:

Zeolite L was prepared via hydrothermal synthesis from cheap industrial raw materials，water glass with kaolin and partial kaolin microspheres. The initial composition for the synthesis is 1 Al₂O₃：4.7（KOH+NaOH）：14SiO₂：250H₂O，（K₂O/Na₂O=2.5 molar ratio）. The synthesized zeolite L was characterized using X-ray diffraction（XRD），scanning electron microscopy（SEM）. The prepared zeolite L showed typical XRD characteristic peaks of zeolite L. SEM showed that the synthesized zeolite L exhibited spherical crystals，which converted into multi-rhombus columnar perfect crystals upon addition of fluoride additives.

摘要：

以廉价工业原料水玻璃在高岭土微球，偏土微球上水热合成出L沸石。合成初始组成为：1Al₂O₃∶4.7（KOH+NaOH）∶14SiO₂∶250H₂O（摩尔比K₂O/Na₂O=2.5）。采用X射线衍射（XRD）、扫描电镜（SEM）对合成的L沸石分子筛进行了表征。XRD检测结果表明：制备的L沸石分子筛具有典型的L沸石特征峰。SEM电镜表明：合成出的L沸石的晶形呈球状，在加入氟离子添加剂后晶型变为多菱柱状，晶型完美。