The Influence of Pulping Conditions on the Structure of Acetosolv Eucalyptus Lignins
- 1 February 1997
- journal article
- research article
- Published by Taylor & Francis Ltd in Journal of Wood Chemistry and Technology
- Vol. 17 (1), 147-162
- https://doi.org/10.1080/02773819708003124
Abstract
Acetosolv lignins obtained under a variety of pulping conditions as regards acetic acid concentration, catalyst concentration, temperature and pulping time were characterized structurally by elemental analysis, FTIR and 1H and 13C NMR spectroscopy, and determination of methoxyl group content. Increasing catalyst concentration and pulping time favours both the dissolution of lignin (by cleavage of α and β-O-4 bonds) and the occurrence of condensation reactions. Increasing temperature favours the degradation of syringyl units more than of guaiacyl units.Keywords
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