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Paper Information

Journal:   IRANIAN JOURNAL OF CHEMISTRY AND CHEMICAL ENGINEERING (IJCCE)   2005 , Volume 24 , Number 4; Page(s) 9 To 14.
 
Paper: 

SYNTHESIS OF HYDROPHOBIC SILICALITE ADSORBENT FROM DOMESTIC RESOURCES: THE EFFECT OF ALKALINITY ON THE CRYSTAL SIZE AND MORPHOLOGY

 
 
Author(s):  VAKILI D., ATTARNEJAD M.A., MASSOUDIAN S.K., AKBARNEZHAD M.M.*
 
* RESEARCH INSTITUTE OF PETROLEUM INDUSTRY (N.I.O.C.), CATALYSIS RESEARCH CENTER,TEHRAN, I.R. IRAN
 
Abstract: 

A new polymorph crystalline silica composition having uniform pore dimensions were synthesized by calcining a crystalline hydrated alkyl-ammonium silicate. The pore dimensions approximately were 6 angstrom for silicalite-1 and 11 angstrom for silicalite-2 units. The silicalite-1 was prepared hydrothermally at a pH of about 10 from a reaction mixture consist of water, amorphous silica and a quaternary ammonium compound. Domestic water glass was ion-exchanged to produce silicasol. In this work we also investigated the influence of alkalinity percent in the starting gel mixture on the crystal shape and size.

 
Keyword(s): SILICALITE, POLYMORPH CRYSTALLINE SILICA, AMORPHOUS SILICA, TETRAPROPYLAMMONIUM BROMIDE
 
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