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作 者:张耀日[1] 裴仁彦[1] 霍志萍[1] 于海斌[1]
出 处:《无机盐工业》2015年第4期75-78,共4页Inorganic Chemicals Industry
摘 要:在季戊四醇和四乙基氯化铵低共融混合物中,采用离子热法将苏州高岭土为主要原料的微球原位晶化制备了SAPO-34分子筛微球。考察了晶化条件和晶化液对原位合成的影响。通过XRD和SEM等手段对合成的微球进行了表征。实验结果表明,在晶化温度为180℃下,晶化液物质的量比为n(二氧化硅)∶n(氧化铝)∶n(五氧化二磷)∶n[N-甲基咪唑(2-甲基咪唑)]∶n(氟化氢)∶n(水)=2.26∶1∶0.5∶0.66∶0.3∶26.4时,晶化20 h可以合成出SAPO-34分子筛微球。加入导向剂N-甲基咪唑和2-甲基咪唑有利于SAPO-34分子筛的合成。In the eutectic mixtures of pentaerythritol and tetraethylammonium chloride, SAPO-34 molecular sieves were suc- cessfully synthesized in-situ on Suzhou kaolin microspheres.The effects of synthesis conditions and composition of the crystalli- zation liquid on the crystallization of SAPO-34 molecular sieves were investigated.The synthesized microspheres were char- acterized by XRD and SEM etc..SAPO-34 molecular sieve microspheres were synthesized optimally at 180 ℃ for 20 h using the gel composition at n (SiO2) :n (A1203) :n (P205) :n (SDA) :n (HF) :n ( H20 ) =2.26:1:0.5:0.66:0.3:26.4. N-methylimidazole and 2-methylimidazole were the favorable SDAs (structure directing agents ) for the synthesis of SAPO-34 molecular sieves ionothermally.
关 键 词:SAPO-34分子筛 原位合成 离子热合成 高岭土微球
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