使用TEABr模板剂合成高硅锌硅分子筛VPI-8  

SYNTHESIS OF HIGH-SILICA ZINCOSILICATE MOLECULAR SIEVE VPI-8 USING TEABr AS THE TEMPLATE

作　　者：薛春峰[1] 厉学武[1] 赵哲军[1] 刘光焕[1] 董晋湘[1] 

机构地区：[1]太原理工大学精细化工研究所,山西太原030024

出　　处：《石油学报（石油加工）》2004年第5期27-31,共5页Acta Petrolei Sinica(Petroleum Processing Section)

摘　　要：在ZnO SiO2 Li2O H2O反应体系中添加四乙基溴化铵(TEABr)水热合成锌硅分子筛VPI 8,考察了反应条件和化学组成对合成过程的影响,并用XRD、SEM和化学分析法表征了合成的VPI 8样品。结果表明,添加有机物TEABr可以水热合成锌硅分子筛VPI 8,其适宜的溶胶组成为n(ZnO)∶n(SiO2)∶n(Li2O)∶n(TEABr)∶n(H2O)=(0.02～0.1)∶1∶(0.1～0.3)∶(0.1～1.0)∶30;随着反应溶胶中n(ZnO)/n(SiO2)的降低,分子筛VPI 8骨架中n(ZnO)/n(SiO2)也降低,而且其形貌特征也发生了明显的变化。The influence of initial composition of reaction sol system and reaction conditions on the hydrothermal synthesis of zincosilicate molecular sieve VPI-8 was systematically studied in the reaction system of ZnO-SiO2-Li2O-TEABr-H2O. Synthesized samples were characterized by XRD, SEM and chemical analysis. Experimental results show that TEABr can be used as the template for hydrothermal synthesis of zincosilicate molecular sieve VPI-8 and the suitable mole composition of the sol system was n(ZnO): n(SiO2):n(Li2O):n(TEABr):n(H2O) = (0.02-0.1):1:(0.1-0.3)-(0.1-1.0):30, with the decrease of w(ZnO)/w(SiO2) of the reaction sol, n(ZnO)/w(SiO2) of the synthesized VPI-8 sample also decreased, and the shape and the size of the crystallized particles changed obviously.

关 键 词：TEABr 模板剂 分子筛 VPI-8 四乙基溴化铵 沸石 有机物 合成方法 

分 类 号：TQ424.25[化学工程]