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通过考察实验影响因素以在最佳条件合成一种具有潜在应用价值的高水热稳定性材料。通过降解NaY分子筛形成其前驱体,以CTMABr(十六烷基三甲基溴化铵)为模板剂合成介-微孔分子筛。XRD和FT-IR表征结果表明材料的孔壁含有沸石结构单元,在750℃,100%水蒸汽中处理2h后介孔结构依然存在。研究认为在最佳条件下合成的材料是一种高水热稳定性的孔壁含有沸石结构单元的介孔材料,且与直接制备分子筛前驱体的过程相比,降解微孔分子筛制备前驱体有沸石回收和成本低廉两方面的优点。
By investigating the influencing factors of the experiment, a highly hydrothermally stable material with potential application value was synthesized under the best conditions. The mesoporous molecular sieves were synthesized by degrading NaY zeolite and CTMABr (cetyltrimethylammonium bromide) as template. The results of XRD and FT-IR indicated that the pore wall of the material contained zeolite structural units, and the mesoporous structure still existed after treated with 100% steam at 750 ℃ for 2 h. It is considered that the synthesized material under optimal conditions is a mesoporous material containing zeolites with pore structure and high hydrothermal stability. Compared with the direct preparation of molecular sieve precursors, the preparation of precursor for degradation of microporous molecular sieves has Zeolite recovery and low cost advantages.