蒸气相中笼形类沸石材料MTN单晶的合成规律

Single crystal MTN has been synthesized by vapor phase transport route (VPT) using n-propylamine as a new template. The synthesis conditions of single crystal MTN including compositions of reaction mixture, crystallization temperature, time, etc. were investigated. The synthesized samples were characterized by XRD, FT-IR and SEM. The experimental results showed that MTN could be well synthesized at the following conditions: crystallization temperature 453K~493K, crystallization time 15d, chemical compositions of gels and liquid reaction mixtures (0.5~1.0) NH4F-SiO2-6.7H2O, n-propylamine/(n-propylamine+H2O) 16.7%~100% (mol ratio) respectively. The increase in the relative crystallinity of MTN was in proportion to the increase in molar percent of n-propylamine, mole ratio of NH4F/ SiO2, crystallization temperature respectively. The particle size of the synthesized single crystal MTN was up to 250μm.