METHOD OF OBTAINING COAGULANT-FLOCCULANT Russian patent published in 2013 - IPC C02F1/52 C01F7/52 C01F7/74 C02F103/04 

FIELD: chemistry.

SUBSTANCE: invention can be used in purification of natural water and industrial sewage. To realise the method decomposition of alumosilicate-containing raw material with sulfuric and hydrochloric acid with further separation of obtained solution from reaction mass and introduction in it of additional reagent, until target product is obtained. During decomposition of alumosilicate-containing raw material inorganic fluorine-containing compound is additionally introduced into reaction mass. As additional reagent, water solution of inorganic salt of trivalent metal is used. As inorganicfluorine-containing compound, used is sodium fluoride, water solution of hydrofluoric acid or hexafluorosilicic acid, and as inorganic salt of trivalent metal, used is trivalent iron chloride.

EFFECT: method ensures increased efficiency of purification of water of different origin and composition with application of obtained coagulant-flocculant.

6 cl, 1 tbl, 7 ex