METHOD OF PRODUCING LICORICE EXTRACT Russian patent published in 1999 - IPC

FIELD: biologically active substances. SUBSTANCE: invention relates to isolation of sweet substances from licorice root for use in food industry and medicine. Licorice roots are disintegrated and petalized, resulting vegetable stuff is extracted with aqueous ammonium solution, extract is separated and concentrated. Extracted material is precipitated from concentrate with ethanol. Separated precipitate is freed from residual ethanol through extraction with liquid carbon dioxide-acetylene mixture (weight ratio from 3: 7 to 7:3) at superatmospheric pressure. Ethanol-containing extract is separated and rest of extractant is evaporated from precipitate by reducing pressure to normal. EFFECT: reduced ethanol consumption and improved production condition.