The influence parameters on the synthesis of TS-1 from inorganic reactant system

Titanium silicalite - 1(TS - 1) was synthesized from inorganic reactant sys tem using cheap colloidal silicon and TiCl3 aqueous solution as the silicon and titanium sources, respectively, TPABr as the templating agent, and die thylamine, n - butylamine, ammonia as base to provide the alkalinity necess ary for crystallization. The TS - 1 synthesized from the inorganic reactant system has been demonstrated to have the same characteristics with the sta ndard TS - 1 from organic synthesis system by XRD, IR, UV - vis, SEM, eleme ntal analysis and N-2 adsorption/desorption. The influence of various synth esis parameters such as base source, SiO2/TiO2 ratio, N-2 protection, seed crystals, amounts of template, silicon source and crystallization time has been investigated in detail. It has been shown that the control of basicity of the reaction mixture is critical for the synthesis; N-2 protection is e ssential when reactants were mixed; adding seeds can greatly facilitate the formation of the TS - 1 crystal; there is a critical value for the minimum amount of TBABr required to crystallize TS - 1; TS - 1 crystals obtained w ith colloidal silicon are usually large.