Extraction of hemicellulose and condensed tannin from spruce bark

Katariina Kemppainen, Vidar Grönberg

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsProfessional


Tannin industry is looking for new industrial sources for condensed tannins due to the limited availability of the current raw materials such as Acacia bark and quebracho wood. Spruce bark is a promising source of polyphenolic compounds including condensed tannins, which can be extracted in an unpressurized hot water treatment. In addition to phenolic compounds, hot water extraction dissolves a large amount of hemicellulose and monosaccharides from spruce bark. To be able to fractionate these two groups of compounds and to find uses for the extractable bark sugars, it is important to understand the effect of extraction parameters to the extract composition and its sugar profile. The research leading to these results has received funding from the WoodWisdom-Net Research Programme which is a transnational R&D programme jointly funded by national funding organisations within the framework of the ERA-NET WoodWisdom-Net 2.
Original languageEnglish
Title of host publicationNWBC 2012
Subtitle of host publicationThe 4th Nordic Wood Biorefinery Conference
EditorsKlaus Niemelä
Place of PublicationEspoo
PublisherVTT Technical Research Centre of Finland
ISBN (Electronic)978-951-38-7881-8
ISBN (Print)978-951-38-7880-1
Publication statusPublished - 2012
MoE publication typeD3 Professional conference proceedings
Event4th Nordic Wood Biorefinery Conference, NWBC 2012 - Helsinki, Finland
Duration: 23 Oct 201225 Oct 2012
https://www.vtt.fi/inf/pdf/technology/2012/T53.pdf (Full proceedings)

Publication series

SeriesVTT Technology


Conference4th Nordic Wood Biorefinery Conference, NWBC 2012
Abbreviated titleNWBC 2012
Internet address


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