PROCESS FOR PREPARATION OF HIGH-SILICA FAUJASITE TYPE ZEOLITE

摘要

PROCESS FOR PREPARATION OF HIGH-SILICA FAUJASITE TYPE ZEOLITE A faujasite type zeolite having a high SiO2/Al2O3 ratio is prepared by simultaneously and continuously supplying an aqueous solution of an alkali metal silicate and an aqueous solution of an aluminum-containing compound whereby the alkali metal silicate is continuously reacted with the aluminum-containing compound to prepare a homogeneous phase compound of a granular amorphous aluminosilicate containing aluminum in an amount of 10 to 16% by weight, as Al2O3 and based on the anhydride; and then, crystallizing the granular homogeneous phase amorphous aluminosilicate in an aqueous alkali metal hydroxide solution having a concentration of 4 to 10% by weight.