【摘要】 在乙二胺-SiO₂Al₂O₂-Na₂O-三乙胺非水体系中合成了ZSM-35沸石。利用XRD、SEM、IR和DTA-TG对不同晶化时间非水合成ZSM-35沸石的晶化动力学进行了考察。从DTA-TG曲线清楚地观察到沸石的晶化过程,XRD可表明晶化过程中晶体成长的规律,而IR则表征ZSM-35沸石内部五员环特征峰(550cm^-1)随晶化时间增长的情况。在整个晶化过程中固相SiO₂/Al₂O₃不变,液相无硅铝酸根存在,证明非水体系中ZSM-35沸石的合成属于固相转化过程。更多还原

【Abstract】 ZSM-35 zeolite was synthesized in a non-aqueous system composed of ethyldiamine-SiO₂-Al₂O₃-Na₂O and triethylamine. The kinetics of crystallization of ZSM-35 was studied by XRD, SEM, IR and DTA-TG. Zeolite ZSM-35 and natural ferrite are shown to be closely related having a similar faulted structure. The crystallization process was clearly revealed by the DTA-TG curves, and crystal growth could be followed by XRD. The IR band at about 550cm^-1 increased with the time of crystallization. During crystallization, the molar ratio of SiO₂/Al₂O₃ in the solid phase did not change, and no aluminosilicate polyanions was found in the liquid phase. These results show that the crystallization of ZSM-35 zeolite during its synthesis in non-aqueous system follows a typical solid phase transformation mechanism.更多还原