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在1-甲基-3-乙基咪唑溴盐离子液体([emim]Br)中合成了球形的方钠石分子筛,分别通过X射线衍射仪(XRD)和扫描电子显微镜(SEM)等表征手段对产物进行了表征。结果表明,在反应物料配比相同的条件下,离子热合成有利于球形方钠石结构的形成。在反应物料中nNa2SiO3·9H2O/nNaAlO2为1.1(即nSiO2/nAl2O3=2.2)和5.0时(即nSiO2/nAl2O3=10)时,离子热合成得到了粒径为0.2和1.4μm的球形方钠石分子筛,而水热合成分别得到了X型分子筛和一种未知结构的产物。
Spherical sodalite molecular sieves were synthesized in 1-methyl-3-ethylimidazolium bromide ionic liquid ([emim] Br) and characterized by means of X-ray diffractometry (XRD) and scanning electron microscopy (SEM) The product was characterized. The results show that ionic thermal synthesis is beneficial to the formation of spherical sodalite under the same reaction mass ratio. When nNa2SiO3 · 9H2O / nNaAlO2 was 1.1 (ie, nSiO2 / nAl2O3 = 2.2) and 5.0 (ie, nSiO2 / nAl2O3 = 10) in the reaction mixture, spherical sodalite molecular sieves with particle sizes of 0.2 and 1.4 μm , While hydrothermal synthesis obtained X-type molecular sieve and an unknown structure of the product.