| abstract |
FIELD: technological processes.SUBSTANCE: invention relates to a method of producing betulin from birch bark for use in medicine and perfumery, involving UHF extraction of birch bark with propylene glycol at ratio of extractant : bark of 30:1, power of 300 W, duration of 10 minutes, followed by crystallization.EFFECT: method provides higher efficiency of the process of producing betulin via reduction of technological operations, shorter duration of extraction of the end product, avoiding use of highly flammable alcohols.1 cl, 2 tbl |