METHOD OF OBTAINING HIGHLY PURIFIED DIHYDROQUERCETIN Russian patent published in 2009 - IPC A61K36/00 B01D15/08 B01D15/42 

FIELD: chemistry.

SUBSTANCE: present invention pertains to chromatographic separation of bioflavonoids. A solution of dihydroquercetin-containing raw material in an aqueous solution of aliphatic alcohol C₁-C₃ is obtained. At least one chromatography cycle is carried out with depositing a sample of the obtained solution on a column, filled with hydrophobic sorbent. The mobile phase is eluted. The sample is deposited at 1-20% vol. concentration of alcohol in the solution. The mobile phase used is an aqueous solution of the same alcohol with 3% more concentration than concentration of alcohol in the solution from which the sample is deposited, but not exceeding 30% vol. The eluate obtained from chromatography is evaporated and the residue is dried.

EFFECT: obtaining high output of product with high degree of purity.

3 cl, 3 ex