| abstract |
The invention relates to the extraction of technical quantities of pure and natural homoeriodictyols (3`-methoxy-4`,5,7-trihydroxyflavanone) in the form of homoeriodictyol sodium salt and of sterubin (7-methoxy-3`,4`,5-trihydroxyflavanone) from plants of the genus Eriodictyon. To this end, the plant material is extracted using a non-water miscible extractant, the extract is dewaxed, is optionally prepurified using activated carbon, is treated with a sodium ion-containing, basic, aqueous solution, and the precipitated homoeriodictyol sodium salt is purified by reprecipitation or crystallization. |