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
Displacement batch cooking – process description Process steps Displacement batch cooking cycle in relation to Rapid Displacement Heating (RDH) and SuperBatch cooking techniques 1 is presented in Figure 1, showing a diagram of various step sequences. The step sequences include the following functions:1 Chip fill. The digester is filled with chips, often using a
Authors & references
Authors:
Raimo Alén, University of Jyväskylä and Victoria Lindqvist, Forest Products Engineers have condensed and modified the text mainly from the reference “Gustafsson, J., Alén, R., Engström, J., Korpinen, R., Kuusisto, P., Leavitt, A, Olsson, K., Piira, J., Samuelsson, A. and Sundquist, J. 2011. Pulping. In: Fardim, P. (Ed.). Chemical Pulping Part 1, Fibre Chemistry and Technology. 2nd edition. Paper Engineers’ Association, Helsinki, Finland. Pp. 187−381”. More literature references can also be found in this chapter.
References:
- Gustafsson, J., Alén, R., Engström, J., Korpinen, R., Kuusisto, P., Leavitt, A, Olsson, K., Piira, J., Samuelsson, A. and Sundquist, J. 2011. Pulping. In: Fardim, P. (Ed.). Chemical Pulping Part 1, Fibre Chemistry and Technology. 2nd edition. Paper Engineers’ Association, Helsinki, Finland. Pp. 187−381.
- Uusitalo, P. and Svedman, M. 1999. In: Gullichsen, J. and Fogelholm, C.-J. (Eds.). Chemical Pulping, Book 6A. Fapet Oy, Helsinki, Finland. Pp. A492-A511.
- Tikka, P. 1992. Conditions to extend kraft cooking successfully. Proceedings of the TAPPI Pulping Conference, Boston, MA, USA. Pp. 699–706.
- Tikka, P. and Kovasin, K. 1990. Displacement vs. conventional batch kraft pulping: delignification patterns and pulp strength delivery. Paperi ja Puu 72(8):773–779.
- Cyr, K., Embley, D. and MacLeod, J. 1989. Stronger kraft softwood pulp – achieved!. TAPPI Journal 72(10):157–163.
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This page has been updated 10.05.2021