合成条件对偏高岭土水热合成Y型分子筛结构的影响
The Affects of Synthesis Conditions of NaY Zeolite from Metakaolin by Hydrothermal Method
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摘要: 采用苏州高岭土作原料,在不同条件下水热合成Y型分子筛,考察合成条件对形成Y型分子筛结构和性能的影响.结果表明,各种合成条件(高岭土的煅烧温度、导向剂用量、碱用量、陈化条件、成胶温度、晶化温度)对合成分子筛复合材料的结晶度、硅铝比、颗粒度、形貌都有影响,最后提出了制备高活性分子筛复合材料的较佳合成条件:650℃偏高岭土,导向剂用量4%,碱用量3%,成胶温度60℃,陈化2 h,晶化温度90℃.Abstract: NaY zeolite was synthesized from kaolin by hydrothermal method at different conditions.The synthesis factors affecting the structure and property of NaY zeolite were studied.The results showed that all factors had effect on the crystallinity,SiO2/Al2O3,size and morphology of NaY zeolite.Finally the better synthesis conditions of preparing high active NaY zeolite were put forward: 650 ℃ metakaolin,4% agent,3% alkali solution,gel temperature 60 ℃,aging temperature 2 h and crystal temperature 90 ℃.
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