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以自制微米级分子筛为晶种,在清液体系中成功合成出高性能的T型分子筛膜,考察了硅铝比、水硅比、碱度及合成温度与时间等条件对膜的生长和渗透汽化性能的影响. 结果表明,在摩尔组成为1SiO2:0.015Al2O3:0.41(Na2O+K2O):30H2O 的清液体系中,于423K晶化6h的条件下可较快地形成一层厚度为5μm的连续致密纯相T型分子筛膜,较大缩短了膜合成时间且提高了膜致密性. 在优化条件下所合成的膜具有优良的分离性能和高重复性. 348K时,在10wt%水-90wt%异丙醇混合物体系中膜的渗透通量和分离因子分别高达4.20kg/(m2·h) 和 7800.
High-performance T-type zeolite membrane was successfully synthesized in the supernatant system with self-made micron-sized molecular sieve as seed crystal. The growth and permeation of the membrane were investigated under the condition of Si / Al ratio, water to silica ratio, alkalinity, synthesis temperature and time The results show that in the liquid system with the molar composition of 1SiO2: 0.015Al2O3: 0.41 (Na2O + K2O): 30H2O, a layer with a thickness of 5μm can be rapidly formed under the condition of 423K crystallization for 6h. Continuous compact T-type zeolite membrane, which greatly shorten the membrane synthesis time and improve the membrane densification under the optimized conditions of the membrane has excellent separation performance and high repeatability at 348K, 10wt% water -90wt The permeation flux and separation factor of membranes in the mixture of% isopropanol were up to 4.20kg / (m2 · h) and 7800, respectively.