Abstract
Improving the quality of cellulose semi-finished products for subsequent chemical processing in combination with the “green” concept is an important technical challenge. The article investigated a number of organic solvents as a delignifying agent. It has been shown that DMSO usage is the most efficient organosolv way to obtain cellulose from birch wood (B. pendula). The influence of the concentration of the organic solvent in the cooking liquid, the concentration of the acid catalyst, the duration and temperature of the process has been studied. The conditions for maximum process desirability at which the highest yield of cellulosic semi-finished product (CSP) and degree of delignification were as follows: 2 h treatment time at 156 °C, DMSO/water 75–95% solvent system with solid to liquid ratio of 1:10. At a concentration of DMSO in the cooking liquor of 85–90%, the degree of wood delignification was about 95%. The mechanical properties of the experimental DMSO pulp were similar to those of kraft pulp. DMSO lignin was characterized by Pyr-GC/MS. More than 65% of monomer fragments of phenolic compounds were S-unit derivatives. The results show that organosolv delignification with DMSO/Water can be proposed as an eco-friendly alternative process to the kraft pulping.
Funding source: Russian Science Foundation
Award Identifier / Grant number: 22-13-20015
Acknowledgments
This research was performed using instrumentation of Core Facility Center “Arktika” of Northern (Arctic) Federal University.
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Author contributions: All the authors have accepted responsibility for the entire content of this submitted manuscript and approved submission.
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Research funding: This study was funded by the Russian Science Foundation (RSF), project no. 22-13-20015. “The study of structural features and structural transformations of lignins during the various methods of delignification.”
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Conflict of interest statement: The authors declare no conflicts of interest regarding this article.
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Supplementary Material
The online version of this article offers supplementary material (https://doi.org/10.1515/hf-2022-0113).
© 2022 Walter de Gruyter GmbH, Berlin/Boston
Articles in the same Issue
- Frontmatter
- Original Articles
- Intra-species variation in maximum moisture content, cell-wall density and porosity of hardwoods
- Fractal dimension of wood pores from pore size distribution
- Fatigue testing of wood up to one billion load cycles
- The influence of vacuum heat treatment on the pore structure of earlywood and latewood of larch
- The relationship between color and mechanical properties of heat-treated wood predicted based on support vector machines model
- Effect of water/moisture migration in wood preheated by hot press on sandwich compression formation
- Quercetin-grafted modification to improve wood decay resistance
- Organosolv delignification of birch wood (Betula pendula): DMSO/water pulping optimization
- Alkali lignin as a pH response bifunctional material with both adsorption and flocculation for wastewater treatment
- Evaluation of the mechanical properties of different parts of bending bamboo culm by nanointendation
Articles in the same Issue
- Frontmatter
- Original Articles
- Intra-species variation in maximum moisture content, cell-wall density and porosity of hardwoods
- Fractal dimension of wood pores from pore size distribution
- Fatigue testing of wood up to one billion load cycles
- The influence of vacuum heat treatment on the pore structure of earlywood and latewood of larch
- The relationship between color and mechanical properties of heat-treated wood predicted based on support vector machines model
- Effect of water/moisture migration in wood preheated by hot press on sandwich compression formation
- Quercetin-grafted modification to improve wood decay resistance
- Organosolv delignification of birch wood (Betula pendula): DMSO/water pulping optimization
- Alkali lignin as a pH response bifunctional material with both adsorption and flocculation for wastewater treatment
- Evaluation of the mechanical properties of different parts of bending bamboo culm by nanointendation