METHOD OF PRODUCING COAGULANT FOR WATER TREATMENT Russian patent published in 2011 - IPC C02F1/52 C01F7/54 C01G49/10 

FIELD: chemistry.

SUBSTANCE: invention relates to production of inorganic coagulants based on iron and aluminium compounds. Aluminium metal is dissolved in aqueous solution of iron (II) chloride with concentration of iron ions 45-70 g/l, while stirring for 10-15 min. The precipitate is separated. Fe (II) is oxidised to Fe (III) using hydrogen peroxide at temperature 70-80°C for 1-2 hours.

EFFECT: method increases output of coagulant 2-3 times and also lowers content of aluminium and iron in water treated using the coagulant 2 and 3 times, respectively.

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