反应条件对NaX型纳米分子筛结晶行为的影响  

Effect of Reaction Condition on Crystallization Behavior of NaX Sieve

作　　者：王银叶[1] 郭晓霞[1] 张晶[1] 陈旭[1] 王蕾[1] 

机构地区：[1]天津城市建设学院环境与市政工程学院天津市水质科学与技术重点实验室,天津300384

出　　处：《硅酸盐通报》2011年第6期1434-1439,共6页Bulletin of the Chinese Ceramic Society

基　　金：天津市应用基础及前沿技术重点项目(10JCZDJC24100)

摘　　要：以山西煅烧高岭土为原料,在无模板剂、晶种、导向剂及任何添加剂存在的条件下,采用水热法在1吨反应釜内合成了纳米级的NaX型分子筛。借助XRD探讨了在中试阶段的碱度、反应温度和反应时间分子筛结晶行为的影响。应用TEM、IR等分析方法对合成产品的物相进行了分析,实验结果表明:n(Na2O)/n(SiO2)的配料比1.5,晶化时间4 h,反应温度100℃能够快速合成出小晶粒NaX分子筛;形成的分子筛晶型完整,NaX分子筛骨架与标准X型分子筛吻合;NaX分子筛分布比较均匀,分子筛晶粒发育良好,粒径小。The calcined kaolin in Shanxi was used as raw material to synthesize nano-scale NaX molecular sieve in one ton-reaction vessel by direct hydrothermal method without template,seed,directed agents or any additives.The effects of alkalinity,temperature and reaction time on crystallization behavior of NaX nano-molecular sieve were explored in the pilot phase by XRD experiment.The process and products in the pilot-scale were characterized by TEM and IR.The results indicated that the suitable mole composition of one ton-reaction vessel was n（Na2O）/n（SiO2）= 1.5 and the best crystallizing time was 4 h,at 100 ℃.The products were nano-NaX molecular sieve with uniform size distribution in nano-scale and complete crystal form,also match the standard X.

关 键 词：煅烧高岭土 纳米分子筛 水热法 

分 类 号：TB321[一般工业技术—材料科学与工程]