13911

Synthesis of Hydrophobic Silicalite Adsorbent from Domestic Resources: The Effect of Alkalinity on the Crystal Size and Morphology

Vakili Davood نويسنده , Attamejad Mohammad Ali نويسنده , Massoodian Sayyed Kamal نويسنده , Akbarnejad Mohammad Mahdi نويسنده

9

14

6

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 angstromfor 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.

1197602