METHOD OF PRODUCING COMPOSITE BACTERICIDAL PREPARATION Russian patent published in 2013 - IPC A01N59/16 B01F3/10 C08J7/04 C08B15/00 C02F3/02 B03D103/00 

FIELD: chemistry.

SUBSTANCE: invention relates to techniques of producing composite bactericidal preparations, having bactericidal and fungicidal activity. The method involves preparation of a dispersion of substrate particles, solutions of salts of bactericidal metals from a group comprising silver and zinc, mixing the dispersion and the solutions, treating the mixture with a reagent from a group comprising a soluble phosphate to form particles of low-solubility metal compounds and precipitation thereof on the substrate particles to form a composite preparation, removal thereof and washing. The group of metals additionally includes copper and nickel. The group of reagents additionally includes sodium hydroxide, chloride and carbonate. The substrate used is particles of fibrillated cellulose fibres and the composite preparation is removed by pressure flotation. The fibrillated cellulose fibres contain, in terms of mass, at least 94% fibres with length of not more than 1.23 mm and at least 54% fibres with length of not more than 0.63 mm, with water retention of not more than 4 ml/g fibre. The mixture is treated in two or more steps. The solution of salts of bactericidal metals used is industrial effluent containing said salts.

EFFECT: method enables to cut duration of the process of preparing a suspension of the preparation, increases concentration of the preparation in the suspension, simplifies the process of extracting the preparation from the suspension and treatment thereof and widens the field of use of the preparation.

4 cl, 1 dwg, 1 tbl, 1 ex