PROCESS FOR PREPARING ZSM-5 TYPE ZEOLITE

摘要

PURPOSE: A process for preparing environmentally friendly ZSM-5 type zeolite having high unit productivity is provided. CONSTITUTION: The process for preparing ZSM-5 type zeolite comprises a step of proceeding hydrogelation reaction by adding a sodium aluminate aqueous solution to a composition silica source in which the inside of pores of the support is activated by adding water and sodium hydroxide aqueous solution to a porous silica support in such a way that composition for the whole reactant is controlled as in the following formula 1:£Na2O|4 to 11£Al2O3|1.0£SiO2|25 to 100£H2O|900 to 4500; and a step of hydrothermal synthesizing the whole reactant as agitating the whole reactant, wherein the porous silica support is an amorphous silica selected from white carbon, silica gel and fumed silica.