TY - JOUR ID - 8103 TI - Synthesis of Hydrophobic Silicalite Adsorbent from Domestic Resources: The Effect of Alkalinity on the Crystal Size and Morphology JO - Iranian Journal of Chemistry and Chemical Engineering JA - IJCCE LA - en SN - 1021-9986 AU - Vakili, Davood AU - Attarnejad, Mohammad Ali AU - Massoodian, Sayyed Kamal AU - Akbarnejad, Mohammad Mahdi AD - Research Institute of Petroleum Industry (N.I.O.C.), Catalysis Research Center, P.O. Box 18745-4163, Tehran, I.R. IRAN Y1 - 2005 PY - 2005 VL - 24 IS - 4 SP - 9 EP - 14 KW - Silicalite KW - Polymorph crystalline silica KW - Amorphous silica KW - Tetrapropylammonium- bromide DO - 10.30492/ijcce.2005.8103 N2 - 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. UR - https://ijcce.ac.ir/article_8103.html L1 - https://ijcce.ac.ir/article_8103_4165a51427c209f35befef7b1a4a8e40.pdf ER -