Korean Journal of Chemical Engineering

, Volume 6, Issue 4, pp 357–359 | Cite as

Crystallization of ferrisilicate molecular sieve in the presence of fluoride ions

  • Suk Bong Hong
  • Seong Ihl Woo
  • Young Sun Uh


The ferrisilicate molecular sieve analogue of the ZSM-5 was prepared from the weak alkaline medium (pH 8) in the presence of F- ions, which was confirmed by IR, X-ray powder diffraction, EPR.and29Si MAS NMR studies. The addition of F- ion in the preparation of metallosilicate molecular sieves could reduced the pH value of the reaction mixture, and prevent from the precipitation of metal ions which are sparingly soluble in strong alkaline media.


Zeolite Magic Angle Spin Tetrapropyl Ammonium Weak Alkaline Medium Tetrapropyl Ammonium Bromide 
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Copyright information

© Korean Institute of Chemical Engineering 1989

Authors and Affiliations

  • Suk Bong Hong
    • 1
  • Seong Ihl Woo
    • 1
    • 2
  • Young Sun Uh
    • 1
  1. 1.Division of ChemistryKorea Institute of Science and TechnologySeoulKorea
  2. 2.Korea Advanced Institute of Science and TechnologyKorea Institute of Science and TechnologySeoulKorea

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