METHOD OF OBTAINING SILICON-CONTAINING AGROCHEMICALS Russian patent published in 2024 - IPC C01B15/14 C01B33/00 C05D9/00 A01N59/00 

FIELD: agriculture.

SUBSTANCE: method of producing a silicon-containing agrochemical containing silicic acid involves mixing of 1–60 wt.%. solution of hexafluorosilicic acid with solid hydroxide and/or oxide of aluminium, sodium or potassium, or with 1–30 wt.% of aqueous solution of ammonium hydroxide, or 1–40 wt.% of an aqueous solution of sodium or potassium hydroxide at a temperature of 15–98°C, after neutralization is completed, solid hydroxide and/or oxide of aluminium, sodium, potassium or 1–30% of the mass are added to the resulting mixture in portions. aqueous solution of ammonium hydroxide, or 1–40 wt.% of aqueous solution of sodium or potassium hydroxide at a temperature of 15–98°C for the decomposition of the formed hexafluorosilicates. The resulting wet precipitate containing silicic acid and a solution of aluminium, ammonium, sodium or potassium fluorides, depending on the reagent used, is separated by filtration to obtain the target product. Also, a method of producing a silicon-containing agrochemical containing silicic acid involves mixing 1–60% of the mass. a solution of hexafluorosilicic acid with solid hydroxide and/or oxide of calcium or magnesium, or with their aqueous suspensions at a temperature of 15–98°C, after stirring and completion of neutralization for 5–15 minutes, solid hydroxide and/or oxide of calcium or magnesium, or their aqueous suspensions, are added to the resulting mixture in portions at a temperature of 15–98°C for the decomposition of the formed hexafluorosilicates. The resulting wet precipitate is separated by filtration, washed several times with water and stored in a wet state. Silicon-containing agrochemical is used in a mixture with other fertilizers in a concentration of 0.1–50% by weight.

EFFECT: proposed method of producing a silicon-containing agrochemical eliminates the polymerization of silicic acids and increases the absorption of silicon by agricultural plants.

9 cl, 3 ex