Study on the Mechanism of Rapid Synthesis of Small Grain NaX Type Molecular Sieve with Calcined Kaolin
Small grain X zeolite molecular sieve was synthesized using calcined kaolin and sodium hydroxide directly and crystallization for 3.5h without template agents,directing agents and seed.The products were characterized using the transmission electron microscopy (TEM) and x-ray diffraction (XRD) analysis.TEM observed that the small grains in 70-80 nm size were well distributed.The hydrothermal crystallization products was X zeolite with complete crystal analysised by XRD.Fourier transform infrared spectroscopy (FTIR) characterization showed that the basic structural unit of component in the solid phase of calcined kaolin and X zeolite had no significant change.After an induction phase of calcined kaolin in the hydrothermal system,large numbers of Nanocrystalline of X zeolite molecular sieve were formed and became the growth unit.And then it has turned into the main structure growth mechanism of the X zeolite.Therefore,rearrangement of crystal phase rotating is believed to be the mechanism of calcined kaolin synthetizing X zeolite.
Rearrangement of crystal phase rotating Hydrothermal system Nanocrystalline Growth pattern
WANG Ying-ye ZHANG Hong-wei Chen-Xu XIAO Yan-hua LUO Yong-na
School of Environmental and municipal, Tianjin Institute of Urban Construction, China
国际会议
中国微米纳米技术学会第14届学术年会、第3届国际年会暨第6届微米纳米技术“创新与产业化国际研讨与展览会(CSMNT2012 & ICMAN2012)
杭州
英文
1-5
2012-11-04（万方平台首次上网日期，不代表论文的发表时间）