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
Cleaning technology Principles of cleaning Materials, which are similar in size to pulp fibres cannot be separated by screening. If these solid contaminants differ in density, they can be separated according to the hydraulic cyclone principle, using hydrocyclones, also called “centrifugal cleaners”. In the cleaning of major pulp flows, centrifugal cleaning has decreased in importance,
Authors & references
Authors:
Raimo Alén, University of Jyväskylä and Victoria Lindqvist, Forest Products Engineers have modified the text from the reference “Tervola, P., Andersson, R., Danielsson, M., Engelfeldt, A., Kiero, S., Olsson, K., Pikka, O., Samuelsson, A. and Siik. S. 2011. In: Fardim, P. (Ed.). Chemical Pulping Part 1, Fibre Chemistry and Technology. 2nd edition. Paper Engineers’ Association, Helsinki, Finland. Pp. 382−456”.
References:
- Tervola, P., Andersson, R., Danielsson, M., Engelfeldt, A., Kiero, S., Olsson, K., Pikka, O., Samuelsson, A. and Siik. S. 2011. In: Fardim, P. (Ed.). Chemical Pulping Part 1, Fibre Chemistry and Technology. 2nd edition. Paper Engineers’ Association, Helsinki, Finland. Pp. 382−456.
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This page has been updated 12.05.2021