以液体硅酸钠、铝酸钠和氢氧化钠为原料,在一种流动体系中制备了工业应用规格的NaA分子筛膜,用XRD和SEM对分子筛膜的晶相结构和表面形貌进行了表征,所制备的NaA分子筛膜具有优良的渗透汽化分离性能.这种流动体系中制备分子筛膜的新方法从根本上避免分子筛合成过程中的浓度梯度问题,有利于制备均匀、连续、致密、分离性能优异的分子筛膜,特别适合于制备工业应用规模的分子筛膜.
A NaA zeolite membrane with commercial length was prepared in flowing system using water glass, sodium aluminate and sodium hydroxide as the raw materials.The crystal structures and the surface images of the NaA zeolite membrane were characterized by XRD and SEM.The NaA zeolite membrane exhibited excellent PV performance for the dehydration of various organic solvents.The preparation of NaA zeolite membranes in flowing system can effectively avoid the concentration gradient in the conventional processes, and it is suitable for producing uniform, continuous and high quality zeolite membrane in industrial scale.
参考文献
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