| 摘要 |
FIELD: chemistry, technological processes. ^ SUBSTANCE: in order to obtain microsherical zeolite of A type with high phase purity, solutions of sodium silicate and acidified aluminium sulfate are introduced in water kaolin suspension and powder-like zeolite NaA with crystal size 0.5-2.0 mcm in amount 5-10% wt, per total weight of kaolin and formed synthetic alumosilicate, is introduced. Hydrogen index (pH) of prepared suspension constitutes 9.5-10.5. Amount of kaolin in mixture - 75-85% wt. Amount of formed synthetic alumosilicate in mixture - 15-25% wt. Suspension is subjected to dispersion drying in smoke gases flow at temperature 350°C, tempered in "boiling" layer at temperature 600°C; tempered granules are crystallised in alkaline aluminate solution, washed with water from excess of alkali and dried. ^ EFFECT: invention allows to obtain zeolite with high adsoption and strength characteristics and with high phase purity. ^ 2 tbl |
