极浓体系下高硅L型分子筛的合成  

SYNTHESIS OF SILICEOUS ZEOLITE L IN EXTREMELY DENSE SYSTEM

作　　者：武行洁[1] 何凯[1] 李晓峰[1] 王裕鑫[1] 周朋燕[1] 窦涛[1,2] 

机构地区：[1]太原理工大学精细化工研究所,山西太原030024 [2]中国石油大学CNPC催化重点实验室,北京102249

出　　处：《石油学报（石油加工）》2008年第B10期219-222,共4页Acta Petrolei Sinica(Petroleum Processing Section)

基　　金：国家自然科学基金项目（20476060）资助

摘　　要：在极浓体系中，以硅铝微球为硅源、硝酸镁为促进剂，引入氟化物作为矿化剂，合成了高硅／铝摩尔比（n（SiO2）／n（Al2O3））的L型分子筛。通过改变氟／硅摩尔比（n（F-）／n（SiO2））、氟源种类、结晶时间、结晶温度等条件，考察了高硅L型分子筛的合成规律，并采用XRD、SEM等手段对合成样品进行了物化性能表征。结果表明，在170℃、以KF为矿化剂、n（KF）／n（SiO2）=0.2、晶化36h条件下，可以合成出n（SiO2）／n（Al2O3）=10的纯相高硅L型分子筛。Siliceous zeolite L was synthesized in extremely dense system with microsphere as the silica source, magnesium nitrate as the accelerant and fluoride as the mineral agent. The synthesis conditions of zeolite L including composition of reaction mixture, crystallization temperature, time, etc. were investigated. The synthesized samples were characterized by XRD and SEM. The experimental results showed that siliceous zeolite L with n（SiO2 ）/n （Al2O3）= 10 was synthesized in extremely dense system at 170℃ for 36 h with potassium fluoride as the mineral agent, n（KF） /n（SiO2 ） =0.2.

关 键 词：L型分子筛 极浓体系 氟化物 

分 类 号：O643[理学—物理化学]