Reactions of carbohydrates – acid sulphite pulping Because of the sensitivity of glycosidic linkages towards acid hydrolysis, the most prominent reaction of polysaccharides during acid sulphite and bisulphite pulping is the cleavage of glycosidic bonds between the monosaccharide moieties in the hemicellulose components, giving rise to monosaccharides and soluble oligosaccharide and polysaccharide fragments.1-4 Hemicelluloses also in
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Reactions of carbohydrates–acid sulphite pulping
Content
Pulping and biorefining
- General approach and principles
- Extraction-based methods
- Separation of valuable extractives from trees
- Choosing the right solvent – hydrophobic or hydrophilic?
- Stemwood extractives-based products
- Operation modes and procedures in industrial extraction processes
- Exudate gums and latexes
- Hot-water extraction
- Wood extractives – general description
- Factors contributing to the loss of extractives
- Chemical changes in extractives during storage
- Bark extractives – terpenes and terpenoids
- Bark extractives – polyphenols and other minor compounds
- Use of deep eutectic solvents
- Chemical and biochemical conversion
- Thermochemical conversion
- Kraft pulping
- Wood material handling systems
- Pulping process-general approach
- Pulping technologies
- Drying of chemical pulps
- Chemical (market) pulps drying plant applications
- Recovery of cooking chemicals and by-products
- Integrated biorefinery concepts
- Oxygen-alkali delignification
- Delignifying or lignin-removing bleaching
- Other delignification methods
- Chemimechanical pulping
- Mechanical pulping
- Pulp characterisation and properties
Authors & references
Author:
Raimo Alén, University of Jyväskylä
References:
- Sjöström, E. 1993. Wood Chemistry – Fundamentals and Applications. 2nd edition. Academic Press, San Diego, CA, USA. Pp. 119–140.
- Alén, R. 2000. Basic chemistry of wood delignification. In: Stenius, P. (Ed.). Forest Products Chemistry. Fapet, Helsinki, Finland. Pp. 58−104.
- Alén, R. 2011. Principles of biorefining. In: Alén, R. (Ed.). Biorefining of Forest Resources. Paper Engineers’ Association, Helsinki, Finland. Pp. 55−114.
- Alén, R. 2018. Carbohydrate Chemistry – Fundamentals and Applications. World Scientific, Singapore. Pp. 483−490.
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Exercises
This page has been updated 24.05.2021
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