| abstract |
The present invention relates to a method for isolating of phenolic sunstances or juvabiones from wood comprising knotwood, said method comprising the steps of a) extracting i) the over-sized chip fraction obtained by screening chipped wood, or ii) a knot-rich sub-fraction obtained from said over-sized chip fraction, or iii) knotwood obtained as a residue in finishing of mechanical wood products, with a polar solvent, and b) recovering the extract. |