水玻璃在高岭土微球上原位晶化L沸石  

Synthesis of zeolite L via in situ crystallization with water glass on kaolin microsphere

作　　者：仇峰[1] 卫冬燕[1] 张忠东 汪毅 刘涛 陈宜俍[1] 郭士岭[1] 

机构地区：[1]郑州大学化工与能源学院,河南郑州450001 [2]中国石油天然气有限公司兰州石化研究院,甘肃兰州730060

出　　处：《化工进展》2010年第10期1947-1950,共4页Chemical Industry and Engineering Progress

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。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.

关 键 词：L沸石 水玻璃 高岭土 偏土 水热合成 

分 类 号：TQ426.6[化学工程]