SAPO-11分子筛合成条件的探究

Synthetic Conditions of SAPO-11 Molecular Sieves

从铝源、物料加入方式、晶化温度与时间以及铝磷比五个方面探究了SAPO-11分子筛合成的最佳条件。通过XRD、粒径分析和SEM对样品进行了表征。结果表明,以拟薄水铝石为铝源,物料配比为n(Al2O3)∶n(P2O5)∶n(DPA)∶n(SiO2)∶n(H2O)=1.5∶1∶1.2∶0.3∶120,用物料加入方式III配置混合溶液,180℃晶化24h,可合成出高纯度和高结晶度的SAPO-11分子筛。

The synthesis of SAPO-11 zeolite molecular sieves was systematically investigated from five aspects, inclu- ding aluminum source, material addition methods, crystallization temperature, crystallization time and the A1 ： P ra- tio. XRD, laser particle size analysis and SEM were used to characterize the as-synthesized samples. The results show that the SAPO-11 molecular sieves with high crystallinity and purity can be synthesized under the following conditions： pseudohohemite is used as aluminum source; the material ratio is n（Al2O3 ） ： n（P2O5 ） ： n（DPA） ： n（Si（）2） ： n（H2O）=1. 5 ： 1 ： 1.2 ： 0.3 ： 120; material addition method Ill is adopted to get the mixed solution; and the solution is crystallized for 24 hours at the temperature of 180 ℃.