METHOD FOR CLEANING HUMIC ACID PREPARATIONS FROM ASH Russian patent published in 2022 - IPC B01D15/08 G01N1/34 B01J20/20 

FIELD: environmental protection and agriculture.

SUBSTANCE: invention relates to the field of environmental protection and agriculture, to technologies that ensure the maintenance and management of soil fertility, as well as to the chemistry of natural compounds. The method for purification of humic acid preparations from ash includes double extraction of humic acids from a natural object with a sodium hydroxide solution, preliminary decalcification of the natural object with an H₂SO₄ solution, then humic acids are precipitated by gradual addition of an H₂SO₄ solution, after which dialysis of humic acid preparations is carried out for 7-10 days, drying, purification of the precipitate of humic acids with hydrofluoric acid for coagulation of mineral suspensions in plastic Petri dishes and further drying of the preparations under a hood to an air-dry state.

EFFECT: isolation of a humic preparation with high biological activity, low cost and ease of obtaining the preparation from available natural raw materials.

1 cl, 1 dwg, 1 ex