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日用化学工业（中英文）

日用化学工业 ›› 2015, Vol. 45 ›› Issue (6): 332-336.doi: 10.13218/j.cnki.csdc.2015.06.008

• 开发与应用 • 上一篇    下一篇

蒸汽相体系下低硅沸石DFT和GIS的合成

石琪, 王飞   

  1. 太原理工大学 精细化工研究所,山西 太原 030024
  • 收稿日期:2015-04-09 出版日期:2015-06-22 发布日期:2019-04-01
  • 作者简介:石 琪(1983-),男,山西人,讲师,博士,电话:13935144846,E-mail:shiqi594@163.com。
  • 基金资助:
    国家自然科学基金资助项目(21306126);山西省基础研究计划资助项目(2013021008-1)

Synthesis of low silica zeolite DFT and GIS under vapor phase system condition

SHI Qi, WANG Fei   

  1. Research Institute of Special Chemicals,Taiyuan University of Technology,Taiyuan,Shanxi 030024,China
  • Received:2015-04-09 Online:2015-06-22 Published:2019-04-01

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摘要： 采用蒸汽相合成法,在F-作为矿化剂以及乙二胺作为液相的条件下,合成出低硅沸石DFT和GIS。重点考察了氢氟酸(HF)用量和硅铝比(n(SiO2)/n(Al2O3))对低硅沸石DFT和GIS合成的影响,其较佳固相凝胶组成分别为:n(HF)∶n(SiO2)∶n(Al2O3)∶n(H2O)=0.5∶1.0∶0.5∶5.0,n(HF)∶n(SiO2)∶n(Al2O3)∶n(H2O)=2.5∶1.0∶0.5∶5.0。元素分析和热重结果表明,双质子化的乙二胺起到平衡骨架负电荷的作用,结构导向合成出低硅沸石DFT和GIS。HF的用量对合成产物物相有明显影响,少量的HF有利于合成低硅沸石DFT,增加HF的用量则导致低硅沸石GIS的生成。

关键词: 低硅沸石, 合成, 蒸汽相

Abstract: Synthesis of low-silica zeolite DFT and GIS were conducted with ethylene diamine as liquid phase and fluoride ion as mineralizing agent.Factors that affect the crystallization of low-silica zeolites,such as the dosage of hydrofluoric acid (HF) and mole ratio n(SiO2)/n(Al2O3),were examined.Results showed that suitable molar compositions of the solid phase gels for low-silica zeolites DFT and GIS are n(HF)∶n(SiO2)∶n(Al2O3)∶n(H2O)=0.5∶1.0∶0.5∶5.0 and n(HF)∶n(SiO2)∶n(Al2O3)∶n(H2O)=2.5∶1.0∶0.5∶5.0,respectively.The results of elemental analyses as well as TG analyses confirmed that di-protonated ethylene diamine plays structure-directing and negative charge-compensating roles in the formation of zeolites DFT and GIS.The results also showed that the HF concentration displays a remarkable influence on the product type.Lower dosage of HF is preferable to form zeolite DFT,while increasing of the dosage of HF is preferable to form zeolite GIS.

Key words: low-silica zeolite, synthesis, vapor phase

中图分类号: 

  • TQ649.4+5