METHOD OF ALUMINOSILICATE RAW COMPLEX PROCESSING Russian patent published in 1997 - IPC

FIELD: chemical technology, inorganic chemistry. SUBSTANCE: aluminosilicate raw is mixed with sodium carbonate up to molar ratios: $$$ = 0.95-1.15, charge is caked and clinker is leached with alkaline-aluminate solution at caustic modulus = 1.5-3.0, at 40-60 C for 1-6 h. After leaching concentration of $$$ in solution is 140-240 g/l and $$$ - 8-12 g/l. Solution obtained after slime removing is diluted with water at 50-100 C up to concentration of $$$ = 120-180 g/l, heated to 70-100 C at the rate 1-10 C/min, stirred for 10-60 min. Solution is separated from the precipitated zeolite and fed to aluminium hydroxide isolation. EFFECT: improved method of processing. 3 cl, 2 tbl