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Chemical‐biotechnological processing of pine bark
Author(s) -
Penas D. Zuhri Vázquez,
Yusty M. A. Lage,
Liñares J. C. Parajó
Publication year - 1992
Publication title -
journal of chemical technology and biotechnology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.64
H-Index - 117
eISSN - 1097-4660
pISSN - 0268-2575
DOI - 10.1002/jctb.280540112
Subject(s) - lignin , residue (chemistry) , chemistry , bark (sound) , hydrolysis , hydrogen peroxide , polysaccharide , pinus pinaster , factorial experiment , acetic acid , enzymatic hydrolysis , kappa number , pulp (tooth) , yield (engineering) , chromatography , pulp and paper industry , organic chemistry , botany , mathematics , materials science , kraft process , biology , medicine , ecology , statistics , kraft paper , pathology , engineering , metallurgy
Samples of Pinus pinaster were treated with NaOH solutions to obtain both a phenolic extract and a solid residue suitable for processing into different marketable end‐products. The experiments performed in the study of the alkaline extraction followed an incomplete factorial design. The independent variables considered and their variation ranges were: liquor/bark ratio (5.25–12.73), temperature (100–130°C) and NaOH concentration (1–3% w/v). The effect of these variables on the residue yield, the lignin content, the polysaccharide content and the glucan/polysaccharide ratio were assessed. The solid residues from the alkaline treatments were delignified using acetic acid and hydrogen peroxide and submitted to enzymatic saccharification. The composition and the susceptibility to hydrolysis of processed samples is discussed.