The Crystallization of Zeolite 4A from MetaKaolinite was studied by chemical analysis, FT IR, XRD and SEM. The results show that the Crystallization of Zeolite 4A is primary solid phase transform mechanism. It is foun...The Crystallization of Zeolite 4A from MetaKaolinite was studied by chemical analysis, FT IR, XRD and SEM. The results show that the Crystallization of Zeolite 4A is primary solid phase transform mechanism. It is found that the Cage Shaped crystal nucleus embryos are firstly formed in the lye of metakaolinite, then the Cage Shaped crystal nucleus embryos are put in order and the crystal of Zeolite 4A is taken shape, Because the metakaolinite method and Chemical Synthesis method have different forming mechanism, the difference of Zeolite 4A on performance is caused.展开更多
4A Zeolite has been prepared from Kaolin under low-temperature hydrothermal conditions. The analysis results on the concentration changes of NaOH, SiO2 and Al2O3 in liquid phases as well as the texture, morphology and...4A Zeolite has been prepared from Kaolin under low-temperature hydrothermal conditions. The analysis results on the concentration changes of NaOH, SiO2 and Al2O3 in liquid phases as well as the texture, morphology and structure changes of solid phases show that the crystallization process of 4A zeolite roughly comprises three periods: induction of crystal nucleus, crystal growth and steady state transformation.展开更多
文摘The Crystallization of Zeolite 4A from MetaKaolinite was studied by chemical analysis, FT IR, XRD and SEM. The results show that the Crystallization of Zeolite 4A is primary solid phase transform mechanism. It is found that the Cage Shaped crystal nucleus embryos are firstly formed in the lye of metakaolinite, then the Cage Shaped crystal nucleus embryos are put in order and the crystal of Zeolite 4A is taken shape, Because the metakaolinite method and Chemical Synthesis method have different forming mechanism, the difference of Zeolite 4A on performance is caused.
文摘4A Zeolite has been prepared from Kaolin under low-temperature hydrothermal conditions. The analysis results on the concentration changes of NaOH, SiO2 and Al2O3 in liquid phases as well as the texture, morphology and structure changes of solid phases show that the crystallization process of 4A zeolite roughly comprises three periods: induction of crystal nucleus, crystal growth and steady state transformation.
