摘要
以氧化铝和硅酸钠为骨架的铝硅源、十六烷基三甲基溴化铵（ＣＴＭＡＢ）为模板剂，用水热法合成超大孔ＭＣＭ－４１分子筛，并对合成过程的主要影响因素进行了考察，结果表明晶化温度过低，形成ＭＣＭ－４１分子筛速度慢，温度过高，会破坏模板分子之间形成胶棒的内聚力。形成ＭＣＭ－４１分子筛还需适当的ＣＴＭＡＢ／Ｈ２Ｏ、碱度、Ｈ２Ｏ／ＳｉＯ２等条件，否则会降低结晶度甚至于生成其它杂晶。
An ultra-large pore zeolite designated as MCM-41 was synthesized by hydrothermalmethod with water glass as silica source, alumina as aluminum source and C16H33(CH3)3NBr (CTMAB) astemplate, and the synthetic conditions were investigated. The results showed that the crystallinity depended on the crystallizing temperature, time, alkalinity and H2O/SiO2 ratio as well as CTMAB/H2O ratio.Lower temperature resulted in slower reaction rate, and too high crystallizing temperature might destroythe formation of micella. Besides the proper synthetic temperature, the favorable pH was in the range of 9to 11. Other parameters such as Si/Al, H2O/SiO2 and CTMAB/H2O ratios also influenced the crystallinity.
出处
《石油炼制与化工》
CAS
CSCD
1996年第8期7-11,共5页
Petroleum Processing and Petrochemicals
关键词
分子筛
合成沸石
制备
模板剂
石油
molecular sieve
synthetic zeolite
preparation
template
