Method for the fractionation of knotty wood extract and use of a liquid-liquid extraction for the purification of knotty wood extract

摘要

A method for fractionation of knotty wood extract, characterized in that knotty wood is initially extracted with a hydrophilic solvent, the resulting knotty wood extract is extracted with a lipophilic solvent, at least a fraction of the knotty wood extract is recovered and said Fractionation is performed as a liquid-liquid extraction.