Abstract
The amounts of formaldehyde-condensable polyphenols extracted from Pinus pinaster bark through alkaline lixiviations performed under different operational conditions are determined. Under the best conditions, both the losses of polysaccharides from the solid phase and the additional extracted polyphenols, coupling two stages of alkaline lixiviation, are evaluated. The effect of particle size on kinetics and yields of the lixiviations is determined.
Zusammenfassung
Die Mengen formaldehyd-kondensierbarer Polyphenole, die aus Pinus pinaster Rinde durch Alkali-Extraktion unter verschiedenen Arbeitsbedingungen gewonnen werden konnten, wurden bestimmt. Unter den jeweils günstigsten Bedingungen wurden die Verluste an Polysacchariden der festen Phase und die zusätzlich gelösten Polyphenole aus einer zweistufigen Alkali-Extraktion gemessen. Der Einfluß der Partikelgröße auf den Verlauf und die Ausbeute der Extraktion wurden untersucht.
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Vázquez, G., Antorrena, A. & Parajó, J.C. Selection of operational conditions in alkaline lixiviation of Pinus pinaster bark. Holz als Roh-und Werkstoff 44, 415–418 (1986). https://doi.org/10.1007/BF02609635
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DOI: https://doi.org/10.1007/BF02609635