METHOD FOR OBTAINING OF PREPARATION BASED ON HYMATOMELANIC ACIDS OF LOW-MINERALISED SILT SULPHIDIC MUDS Russian patent published in 2018 - IPC A61K36/10 B01D11/02 

FIELD: pharmacology.

SUBSTANCE: method for obtaining of a preparation based on hyamomelanic acids from low-mineralised silt sulphidic muds, including sequential three-fold treatment of low-mineralised silt muds with a perchloric acid solution, followed by precipitate washing with water, then the precipitate is treated twice with a sodium hydroxide solution, the alkaline extracts are settled, and decanted with water, filtered, the filtrate is acidified with sulfuric acid to a pH of 1-2, kept at a temperature of 20-25°C for 24 hours, the precipitate is separated and washed with water until a negative reaction to SO₄^2- ions, the hyamomelanic acids are extracted with ethanol until completely removed, the extract is filtered through a paper filter, ethanol is distilled off under vacuum at a temperature of 30-35°C to 1/10 of the original volume, obtained after ethanol distillation, the solution is dried with forced ventilation under certain conditions.

EFFECT: shortened timeframe for final product obtaining and increased yield.

1 dwg, 4 tbl, 1 ex