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Ti-HMS分子筛合成体系pH的研究

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Indexed by:期刊论文

Date of Publication:2004-01-01

Journal:石油化工

Included Journals:PKU、ISTIC

Volume:33

Issue:z1

Page Number:35-36

ISSN No.:1000-8144

Key Words:中孔分子筛;Ti-HMS;pH;合成;晶化机理

Abstract:以十二胺(DDA)为模板剂、正硅酸乙酯为硅源、钛酸四丁酯为钛源,采用室温晶化,成功合成出含钛中孔分子筛Ti-HMS.改变合成体系的pH,制备出一系列Ti-HMS试样,以XRD、FTIR、UV-Vis对试样进行了表征,研究发现Ti-HMS合成体系的pH为10.72~10.83、HCl/SiO2摩尔比为0.02最佳.考察了Ti-HMS合成体系母液的pH随晶化时间的变化,结果表明,随晶化的进行Ti-HMS合成体系母液的pH变化不明显,HMS类中孔分子筛的晶化机理不同于微孔分子筛.

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