METHOD OF OBTAINING BETULIN (VERSIONS) Russian patent published in 2014 - IPC C07J53/00 C07J63/00 

FIELD: chemistry.

SUBSTANCE: invention relates to versions of a method of obtaining betulin from bark of birch, including the bark crushing, its separation into the birch bark and bast, extraction of the birch bark with toluol, exposure to microwave radiation for 20 minutes at a temperature of the mixture boiling or at a temperature of 150°C under pressure 0.28 MPa; the solution is filtered at a temperature of 60÷70°C, a betulin solution in toluol is evaporated, betulin crystals are washed with ethyl or isopropyl alcohol, water and dried.

EFFECT: intensification of the technological process of betulin obtaining with an increase of the output and improvement of the target product quality.

2 cl, 2 ex