| abstract |
The invention relates to methods for producing potassium carbonate. Potassium carbonate is obtained from the mother liquor of carbonization of alumina production by cooling the mother liquor of the double salt, separating the potassium carbonate from the mother liquor, evaporating the mother liquor to a solution density of 1.68 g / cm3, diluting the resulting suspension with water to a total alkalinity of 360-380 g / l (in terms of NaaO), cooling to 20-30 ° C, separating the liquid phase of the suspension, which is then evaporated, cooling the resulting mixture enriched with potassium carbonate, followed by evolution of potassium carbonate. 1 tab. |