A preparation method of binderless spherical
faujasite particles comprises the following steps: 1, mixing an
aqueous solution of
sodium silicate with a solution of a peptizing agent at -5-10DEG C to prepare a
sol having a pH value of 5.0-8.0, adding the
sol into an oil column in a dropwise manner to generate hydrogel beads, collecting the hydrogel beads, washing with water,
ageing,
drying, and
roasting to prepare
silica gel beads, wherein the specific surface area and pore volume of the
silica gel beads, determined through a BET method, are 200-500m<2> / g and 0.6-1.5mL / g respectively, and the peptizing agent comprises an inorganic acid and an inorganic
ammonium salt; 2, uniformly mixing
sodium silicate,
sodium metaaluminate,
sodium hydroxide and water according to a
molar ratio of (16-24)Na2O:Al2O3:(15-20)SiO2:(300-500)H2O, and
ageing at 0-30DEG C for 10-30h to prepare a
liquid phase directing agent; and 3, mixing the
silica gel beads with a sodium metaaluminate solution to obtain a mixed material,
ageing the mixed material at 30-60DEG C, adding the directing agent prepared in step 2 to the mixed material, heating to 90-110DEG C, crystallizing, washing obtained crystallized products with water, and
drying. The method is simple to operate, and the prepared
faujasite particles have a high strength and a large adsorption capacity.