METHOD OF GRANULATED ZEOLITE FILLER PREPARING FOR SYNTHETIC DETERGENTS Russian patent published in 1994 - IPC

FIELD: chemical industry. SUBSTANCE: method of preparing of zeolite type A suspension involves mixing of solutions of sodium silicate, sodium aluminate and aluminium sulfate at the mole ratio Na₂O:SiO₂= 1,0-1,2, SiO₂:Al₂O₃= 2,0-2,5. Aluminium-silicon hydrogel formed is crystallized to the zeolite type A at 60-100 C for 0.4-0.3 h. Zeolite type A suspension prepared in the mother liquor has, g/l: zeolite 100-250; sodium hydroxide 55-110; sodium sulfate 8-20; sodium silicate 0-30. Suspension is fed to the spraying drying at the flue gas. As a result, filler granules showing mechanical strength are formed which has, wt.-%: sodium carbonate 25-30; sodium silicate 0-8; sodium sulfate 3-5; sodium hydroxide 0.2-5, and zeolite type A - the rest (as a dry matter). EFFECT: improved method of filler making. 1 tbl