以凹土为原料利用有机胺模板剂制备ZSM-5沸石  

Synthesis of ZSM-5 Zeolite from Palygorskite via Organic Amine as Template

作　　者：纪寿鹏 蒋金龙[1] 石莹莹[1] 吴妹[1] 曹丽丽[1] 

机构地区：[1]淮阴工学院化学工程学院,江苏省凹土资源利用重点实验室,江苏淮安223003

出　　处：《非金属矿》2016年第4期1-4,共4页Non-Metallic Mines

基　　金：国家自然科学基金(51574130);淮安市科技局社会发展计划(HAS2015002);江苏省青蓝工程;淮阴工学院大学生科技创新计划

摘　　要：以凹凸棒石黏土为原料,酸化后利用廉价有机胺乙二胺、正丁胺、1,6-己二胺为模板剂制备ZSM-5沸石,考察了模板剂类型及合成条件对ZSM-5沸石合成的影响。利用X射线衍射、扫描电镜和N2吸附脱附对所得产品进行了表征。结果表明:3种有机胺均可作为凹土合成ZSM-5沸石的模板剂,但模板作用弱于四丙基溴化铵。合成ZSM-5沸石的适宜条件为:NaOH浓度0.375 mol/L,模板剂质量浓度50 g/L,晶化温度180℃,晶化时间48 h。在适宜合成条件下以正丁胺为模板剂制备ZSM-5沸石比表面积最高,为153 m^2/g。ZSM-5 zeolites were synthesized from acid treated palygoskite via cheap organic amines ethylenediamine, n-buthlamine, and 1, 6-hexanediamine as templates. The products were characterized by X-ray powder diffraction, scanning electron microscopy, and nitrogen adsorptiondesorption experiment. The results indicated that the three organic amines could be used as the template of ZSM-5 zeolites synthesized from palygorskite but its template role was weak compared to tetrapropyl ammonium bromide. The optimum synthesis conditions was listed as follows： the concentration of NaOH solution was 0.375 mol/L, the concentration of template solution was 50 g/L, crystallization temperature was 180℃, and crystallization time was 48 h. The specific surface area of ZSM-5 zeolite synthesized by using n-buthlamine as template under optimum conditions was highest and could reach to 153 m2/g.

关 键 词：凹凸棒石 合成 ZSM-5沸石 有机胺 

分 类 号：TQ424.25[化学工程] TD985[矿业工程—选矿]