FIELD: chemistry.
SUBSTANCE: nepheline raw materials are ground, sintered at a temperature of 400-1000°C with sodium carbonate, or potassium disulfate, or potassium hydrogen sulfate. Speck is treated with water, or an aqueous solution of sulfuric or hydrochloric acid, or an aqueous solution of titanium chloride to obtain a liquid silica-alumina coagulant.
EFFECT: lower costs.
2 cl, 7 ex
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