CONCENTRATE FOR PRODUCING DISINFECTANT, METHODS FOR PRODUCTION THEREOF AND USE Russian patent published in 2013 - IPC A01N59/16 A01N59/00 A01N25/22 A01P1/00 

FIELD: chemistry.

SUBSTANCE: invention relates to disinfectants. The storage stable aqueous concentrate for producing a disinfectant contains hydrogen peroxide in concentration of 30-70 vol. % of the volume of the finished concentrate; colloidal silver in concentration of 150-1000 ppmw of the weight of the finished concentrate; a stabiliser containing at least one biopolymer in concentration of 10-100 ppmw of the weight of the finished concentrate and phosphoric acid to bring pH of the concentrate to values less than or equal to 3. The concentrate contains at least one sodium salt selected from a group consisting of sodium nitrate, sodium sulphate or combinations thereof, in amount of 100-500 ppmw of the weight of the finished concentrate, wherein the concentrate does not contain synthetic organic complexing agents. The aqueous disinfectant contains said concentrate in concentration of at least 0.4 wt % and water. The disinfectant is used to treat drinking water or equipment in contact with drinking water. The method involves (a) preparing an aqueous solution of a stabiliser containing at least one biopolymer; (b) holding said solution at temperature of 60°C or lower, and adding phosphoric acid to said solution while maintaining temperature of 60°C or lower, to obtain an acidified stabiliser solution with pH less than or equal to 3.0; (c) adding a sodium salt selected from a group consisting of sodium nitrate, sodium sulphate and combinations thereof to the acidified stabiliser solution; (d) adding aqueous solution of colloidal silver to obtain an intermediate product; (e) homogenising the obtained intermediate product; (f) adding the intermediate product to aqueous hydrogen peroxide solution at temperature of 30°C or lower; (g) homogenising the obtained mixture to obtain a stable concentrate.

EFFECT: invention enables to use the disinfectant to treat drinking water and food products.

14 cl, 1 dwg, 8 ex