METHOD FOR OBTAINING AN ALUMINUM-SILICON COAGULANT-FLOCCULANT Russian patent published in 2021 - IPC C01F7/00 C01B33/00 C02F1/52 C02F101/10 C02F103/02 

FIELD: inorganic substances technology.

SUBSTANCE: invention relates to the technology of inorganic substances and can be used to obtain silica-containing solutions of aluminum salts used as coagulants-flocculants for the purification of waste and drinking water, as well as the deposition of solid suspensions from mineral suspensions when purifying large volumes of high-turbidity water. A method for producing an alumosilicon coagulant-flocculant includes treating the crushed aluminosilicon raw material with an aqueous solution of hydrochloric acid with stirring and maintaining an elevated temperature to obtain a suspension consisting of an aluminum-silicon-containing solution and insoluble mineral particles, diluting the suspension with water, separating insoluble mineral particles from an aluminum-silicon solution, and acids are set taking into account the stoichiometrically required amount for interaction with acid-soluble components of the raw material, in this case, an aluminum alloy of the aluminum-silicon system is used as an aluminum-silicon raw material, the processing of which is carried out with a 9-12% aqueous solution of hydrochloric acid at an acid consumption of 70-100% of the stoichiometrically required amount while maintaining the temperature within 70-100°С. The suspension can be diluted with water until the SiO₂ concentration is not more than 40 g/l.

EFFECT: high degree of water purification.

2 cl, 4 tbl, 3 ex