METHOD OF PRODUCING ALUMINUM HYDROXOCHLOROSULPHATE Russian patent published in 2019 - IPC C01F7/00 C01F7/56 C01F7/74 C02F1/52 

FIELD: technological processes.

SUBSTANCE: invention can be used in production of aluminum coagulant used in water treatment. To obtain aluminum hydroxochlorosulphate, aluminum sulfurous salt in form of crystalline hydrate – aluminum sulphate Al₂(SO₄)₃⋅18H₂O or aluminum alum R₂SO₄⋅Al₂(SO₄)₃⋅24H₂O, where R is K or NH₄⁺, treated with gaseous ammonia. Obtained reaction mass is subjected to aqueous treatment to form a suspension. Suspension of aluminum hydroxo sulphate which is dissolved in 25–37 % hydrochloric acid at temperature of 70–110 °C is extracted from suspension for 0.5–2 hours to obtain a solution of aluminum hydroxochlorosulphate.

EFFECT: invention reduces number of operations, reduces power consumption and volume of material flows, increases extraction of aluminum into the end product.

3 cl, 4 ex