METHOD FOR PRODUCING COAGULANT BASED ON ALUMINIUM POLYOXYSULFATE, COAGULANT PRODUCED BY SAID METHOD Russian patent published in 2017 - IPC C01F7/74 C02F1/52 

FIELD: chemistry.

SUBSTANCE: method for producing an aluminium-containing coagulant comprises the reacting of aluminium hydroxide with sulfuric acid, maintaining the reaction mixture at a temperature of 120-125°C and the crystallization on the moving chilled surface. The reaction of aluminium hydroxide with sulfuric acid is carried out in the presence of nepheline concentrate at a ratio of aluminium hydroxide to the nepheline concentrate at the ranges of parts by weight of 2:1-3:1, respectively. In the process, aluminium polyoxysulfate is produced. The coagulant providing the possibility of water treatment mostly in the cold season represents an aluminium polyoxysulfate with the basic substance content of 14-18 wt % in terms of Al₂O₃, the active complex of polysilicic acid in an amount up to 10 wt %.

EFFECT: invention allows to increase the coagulant efficiency.

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