METHOD OF PROCESSING PINE TREE BARK Russian patent published in 2010 - IPC C09F1/00 C11B11/00 C11B1/10 

FIELD: chemistry.

SUBSTANCE: method of processing pine tree bark involves extraction of the bark using a non-polar solvent with extraction of coniferous wax, subsequent extraction of pectin from the bark and treatment of the bark residue in activated carbon. After extraction of coniferous wax, the bark residue is extracted with 15% aqueous ethanol at boiling temperature for 0.5 hours. The extract is then filtered off, concentrated, saturated with sodium chloride and the obtained precipitate is separated. The filtrate is extracted with acetylacetate three times, concentrated to 1/8 of the initial volume and proanthocyanidins are settled with chloroform. The extraction agent used to extract pectin is 1% aqueous solution of hydrochloric acid.

EFFECT: method enables virtually complete utilisation of pine tree bark to obtain coniferous wax, proanthocyanidins, pectin and activated carbon.

1 dwg, 1 ex