CHEMICALS GENERATED DURING OXYGEN-ORGANOSOLV PULPING OF WOOD
authors NETO, CP; EVTUGUIN, D; ROBERT, A
journal JOURNAL OF WOOD CHEMISTRY AND TECHNOLOGY
keywords EUCALYPTUS-GLOBULUS; WATER MEDIA; DELIGNIFICATION
abstract In this paper, we have characterized the black liquors from oxygen-organosolv pulping of Eucalyptus globulus wood in ethanol/water solutions (50:50, V/V) and acetic acid/water solutions (80:20, V/V). After pulp separation, the organic solvent has been distilled and recycled; the precipitated lignin has been recovered by filtration. The degradation products in solution have been easily separated by simple extraction techniques. Five main groups of compounds have been isolated: solid lignin (11-12% o.d.w.), sugars (10-17% o.d.w.), aliphatic acids (12,5%), aromatic acids (2% o.d.w.) and low molecular weight phenols (1% o.d.w.). Most of these compounds were identified by HPLC and GC. Solid lignins have been analyzed by FTIR and C-13 NMR spectroscopy. It has been Concluded that oxygen-organosolv pulping process can be a new and interesting way for pulp preparation with little pollution and possibility of total biomass recovery; alternatively, it can be used for the fractionation and valorization of the components of lignocellulosics, including agriculture residues.
publisher MARCEL DEKKER INC
issn 0277-3813
year published 1994
volume 14
issue 3
beginning page 383
ending page 402
digital object identifier (doi) 10.1080/02773819408003104
web of science category Materials Science, Paper & Wood
subject category Materials Science
unique article identifier WOS:A1994PG77900005
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journal analysis (jcr 2017):
journal impact factor 1.418
5 year journal impact factor 1.539
category normalized journal impact factor percentile 83.333
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