The forgotten potential of sulphite-based processes

Research output: Chapter in Book/Report/Conference proceedingConference abstract in proceedingsScientific

Abstract

The current production of sulphite pulps, including paper-grade and semi-chemical pulps, accounts for approximately 5% of the world wood pulp production, and the capacity is predicted to increase. The advantages of sulphite processes include the versatility of process and a high flexibility in pulp yields, facilitating the production of specialized fibre products and the isolation of lignocellulosic materials from the spent liquors for conversion to various value-added products. Sulphite pulping at neutral or slightly alkaline pH is commonly known as a pre-treatment process of high yield semi-chemical (NSSC) pulp production for corrugating medium. However, the research on the utilization of NSSC spent liquors is still very limited. Extending the cooking at neutral pH chemical pulps with high yields of carbohydrates can be produced. The higher amounts of dissolved lignocellulosic materials in the spent liquors of extended neutral sulphite cooks can be utilized in the production of value-added by-products. The aim of this work is to examine the potential of forest biorefinery, based on neutral sulphite process for the production of tailored fibres, with simultaneous isolation of value-added by-products. The preliminary results show the significant glucomannan yield and the content of acidic groups in the produced pine sulphite pulps. Further research is needed to evaluate the potential of fibres in various applications and to define the most valuable materials to be isolated from the spent liquor.
Original languageEnglish
Title of host publicationYoung Researchers' Abstracts 2014
Publication statusPublished - 2014
EventMarcus Wallenberg Prize Award Symposium 2014 - Stockholm, Sweden
Duration: 22 Sep 201423 Sep 2014

Conference

ConferenceMarcus Wallenberg Prize Award Symposium 2014
CountrySweden
CityStockholm
Period22/09/1423/09/14

Fingerprint

sulfites
chemical pulp
dietary fiber
value added
byproducts
pulp
sulfite pulping
wood pulp
paper pulp
biorefining
value-added products
cooking
pretreatment
Pinus
carbohydrates

Keywords

  • high yield sulphite pulp
  • sulphite spent liquor
  • neutral pH
  • glucomann

Cite this

Hanhikoski, S., Niemelä, K., & Vuorinen, T. (2014). The forgotten potential of sulphite-based processes. In Young Researchers' Abstracts 2014
Hanhikoski, Saara ; Niemelä, Klaus ; Vuorinen, Tapani. / The forgotten potential of sulphite-based processes. Young Researchers' Abstracts 2014. 2014.
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Hanhikoski, S, Niemelä, K & Vuorinen, T 2014, The forgotten potential of sulphite-based processes. in Young Researchers' Abstracts 2014. Marcus Wallenberg Prize Award Symposium 2014, Stockholm, Sweden, 22/09/14.

The forgotten potential of sulphite-based processes. / Hanhikoski, Saara; Niemelä, Klaus; Vuorinen, Tapani.

Young Researchers' Abstracts 2014. 2014.

Research output: Chapter in Book/Report/Conference proceedingConference abstract in proceedingsScientific

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T1 - The forgotten potential of sulphite-based processes

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AU - Niemelä, Klaus

AU - Vuorinen, Tapani

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Y1 - 2014

N2 - The current production of sulphite pulps, including paper-grade and semi-chemical pulps, accounts for approximately 5% of the world wood pulp production, and the capacity is predicted to increase. The advantages of sulphite processes include the versatility of process and a high flexibility in pulp yields, facilitating the production of specialized fibre products and the isolation of lignocellulosic materials from the spent liquors for conversion to various value-added products. Sulphite pulping at neutral or slightly alkaline pH is commonly known as a pre-treatment process of high yield semi-chemical (NSSC) pulp production for corrugating medium. However, the research on the utilization of NSSC spent liquors is still very limited. Extending the cooking at neutral pH chemical pulps with high yields of carbohydrates can be produced. The higher amounts of dissolved lignocellulosic materials in the spent liquors of extended neutral sulphite cooks can be utilized in the production of value-added by-products. The aim of this work is to examine the potential of forest biorefinery, based on neutral sulphite process for the production of tailored fibres, with simultaneous isolation of value-added by-products. The preliminary results show the significant glucomannan yield and the content of acidic groups in the produced pine sulphite pulps. Further research is needed to evaluate the potential of fibres in various applications and to define the most valuable materials to be isolated from the spent liquor.

AB - The current production of sulphite pulps, including paper-grade and semi-chemical pulps, accounts for approximately 5% of the world wood pulp production, and the capacity is predicted to increase. The advantages of sulphite processes include the versatility of process and a high flexibility in pulp yields, facilitating the production of specialized fibre products and the isolation of lignocellulosic materials from the spent liquors for conversion to various value-added products. Sulphite pulping at neutral or slightly alkaline pH is commonly known as a pre-treatment process of high yield semi-chemical (NSSC) pulp production for corrugating medium. However, the research on the utilization of NSSC spent liquors is still very limited. Extending the cooking at neutral pH chemical pulps with high yields of carbohydrates can be produced. The higher amounts of dissolved lignocellulosic materials in the spent liquors of extended neutral sulphite cooks can be utilized in the production of value-added by-products. The aim of this work is to examine the potential of forest biorefinery, based on neutral sulphite process for the production of tailored fibres, with simultaneous isolation of value-added by-products. The preliminary results show the significant glucomannan yield and the content of acidic groups in the produced pine sulphite pulps. Further research is needed to evaluate the potential of fibres in various applications and to define the most valuable materials to be isolated from the spent liquor.

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Hanhikoski S, Niemelä K, Vuorinen T. The forgotten potential of sulphite-based processes. In Young Researchers' Abstracts 2014. 2014