Effect of Soda-Additive Pulping on Molecular Characteristics of Residual Pulp Lignin
- 1 January 1992
- journal article
- research article
- Published by Taylor & Francis in Journal of Wood Chemistry and Technology
- Vol. 12 (3) , 243-259
- https://doi.org/10.1080/02773819208545233
Abstract
The soda-additive pulps of pine wood were compared to corresponding soda and kraft pulps in respect to the macromolecular properties of the residual pulp lignins. Results of measurements of number and weight—average molecular weights as well as branching parameters show that the presence of additives such as anthraquinone, methanol and O2—pretreatment significantly causes the breaking of cross-links in the pulp lignin. On the other hand, ethylenediamine and hydroeulfide ion contribute mainly to extensive lignin degradation. The influence of used additives on the condensation reactions of the residual lignin has also been studied.Keywords
This publication has 9 references indexed in Scilit:
- Effect of Lignin Derivatives on the Macromolecular Properties of Lignin in NSSC CookingHolzforschung, 1990
- Lignin. 22. Macromolecular characteristics of alkali lignin from western hemlock woodMacromolecules, 1986
- Étude des Lignines d’Extraction par G.P.C., Viscosimétrie et Ultracentrifugation: Détermination du Degré de RamificationHolzforschung, 1984
- The Influence of Anthrahydroquinone and Other Additives on the Condensation Reactions of Vanillyl AlcoholJournal of Wood Chemistry and Technology, 1981
- Molecular Weight Determinations of DHP's from Mixtures of Precursors by Steric Exclusion Chromatography (HPLC)Holzforschung, 1981
- Alkaline pulping with additives. A reviewWood Science and Technology, 1980
- Chemical aspects of kraft pulpingWood Science and Technology, 1980
- Short NoteHolzforschung, 1979
- Isolation of lignin from spruce by acidolysis in dioxaneWood Science and Technology, 1973