Hemicellulose and lignin fractions obtained by hot water extraction and organosolv cooking of Scots pine

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

Abstract

Hot water extraction was studied as pretreatment for organosolv cooking in order to fractionate wood efficiently into galactoglucomannan (GGM), lignin and cellulosic fibre fractions. With hot water extraction at 160°C, 10.5% of wood could be extracted, which corresponds to more than 60% of wood GGM. The purity of precipitated GGM was about 70%, the main impurities being xylan, galactan and lignin. The organosolv (OS) cooking was performed in acetic acid in the presence of phosphinic acid (the Lignofibre process, LGF). Dissolved lignin was recovered by precipitation from the cooking liquor with excess of water. Hot water extraction induced some changes to the structure of lignin dissolved in subsequent LGF cooking, probably induced by partial cleavage of the -aryl ether bonds during the hot water treatment. Lignin was altered in HWE treatment in such a way that it is more resistant to extraction both during the LGF cooking and alkaline extraction of the LGF pulp
Original languageEnglish
Title of host publication12th European Workshop on Lignocellulosics and Pulp
Subtitle of host publicationEWLP 2012 : August 27-30, 2012, Espoo, Finland : Proceedings
Place of PublicationHelsinki
PublisherUniversity of Helsinki
Pages288-291
ISBN (Print)978-952-10-8187-3
Publication statusPublished - 2012
MoE publication typeB3 Non-refereed article in conference proceedings
Event12th European workshop on lignocellulosics and pulp, EWLP 2012 - Espoo, Finland
Duration: 27 Aug 201230 Aug 2012
Conference number: 12

Conference

Conference12th European workshop on lignocellulosics and pulp, EWLP 2012
Abbreviated titleEWLP 2012
CountryFinland
CityEspoo
Period27/08/1230/08/12

Fingerprint

hemicellulose
Pinus sylvestris
cooking
lignin
water
cellulosic fibers
galactans
hot water treatment
xylan
purity
acetic acid
pulp
ethers
pretreatment
acids

Keywords

  • Hot water extraction
  • organosolv cooking
  • lignin
  • glucomannan

Cite this

Hyvärinen, S., Hakala, T., Tamminen, T., Ohra-aho, T., Liitiä, T., & Suurnäkki, A. (2012). Hemicellulose and lignin fractions obtained by hot water extraction and organosolv cooking of Scots pine. In 12th European Workshop on Lignocellulosics and Pulp: EWLP 2012 : August 27-30, 2012, Espoo, Finland : Proceedings (pp. 288-291). Helsinki: University of Helsinki.
Hyvärinen, Sari ; Hakala, Terhi ; Tamminen, Tarja ; Ohra-aho, Taina ; Liitiä, Tiina ; Suurnäkki, Anna. / Hemicellulose and lignin fractions obtained by hot water extraction and organosolv cooking of Scots pine. 12th European Workshop on Lignocellulosics and Pulp: EWLP 2012 : August 27-30, 2012, Espoo, Finland : Proceedings. Helsinki : University of Helsinki, 2012. pp. 288-291
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title = "Hemicellulose and lignin fractions obtained by hot water extraction and organosolv cooking of Scots pine",
abstract = "Hot water extraction was studied as pretreatment for organosolv cooking in order to fractionate wood efficiently into galactoglucomannan (GGM), lignin and cellulosic fibre fractions. With hot water extraction at 160°C, 10.5{\%} of wood could be extracted, which corresponds to more than 60{\%} of wood GGM. The purity of precipitated GGM was about 70{\%}, the main impurities being xylan, galactan and lignin. The organosolv (OS) cooking was performed in acetic acid in the presence of phosphinic acid (the Lignofibre process, LGF). Dissolved lignin was recovered by precipitation from the cooking liquor with excess of water. Hot water extraction induced some changes to the structure of lignin dissolved in subsequent LGF cooking, probably induced by partial cleavage of the -aryl ether bonds during the hot water treatment. Lignin was altered in HWE treatment in such a way that it is more resistant to extraction both during the LGF cooking and alkaline extraction of the LGF pulp",
keywords = "Hot water extraction, organosolv cooking, lignin, glucomannan",
author = "Sari Hyv{\"a}rinen and Terhi Hakala and Tarja Tamminen and Taina Ohra-aho and Tiina Liiti{\"a} and Anna Suurn{\"a}kki",
note = "Project code: 27110",
year = "2012",
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Hyvärinen, S, Hakala, T, Tamminen, T, Ohra-aho, T, Liitiä, T & Suurnäkki, A 2012, Hemicellulose and lignin fractions obtained by hot water extraction and organosolv cooking of Scots pine. in 12th European Workshop on Lignocellulosics and Pulp: EWLP 2012 : August 27-30, 2012, Espoo, Finland : Proceedings. University of Helsinki, Helsinki, pp. 288-291, 12th European workshop on lignocellulosics and pulp, EWLP 2012, Espoo, Finland, 27/08/12.

Hemicellulose and lignin fractions obtained by hot water extraction and organosolv cooking of Scots pine. / Hyvärinen, Sari; Hakala, Terhi; Tamminen, Tarja; Ohra-aho, Taina; Liitiä, Tiina; Suurnäkki, Anna.

12th European Workshop on Lignocellulosics and Pulp: EWLP 2012 : August 27-30, 2012, Espoo, Finland : Proceedings. Helsinki : University of Helsinki, 2012. p. 288-291.

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

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T1 - Hemicellulose and lignin fractions obtained by hot water extraction and organosolv cooking of Scots pine

AU - Hyvärinen, Sari

AU - Hakala, Terhi

AU - Tamminen, Tarja

AU - Ohra-aho, Taina

AU - Liitiä, Tiina

AU - Suurnäkki, Anna

N1 - Project code: 27110

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Y1 - 2012

N2 - Hot water extraction was studied as pretreatment for organosolv cooking in order to fractionate wood efficiently into galactoglucomannan (GGM), lignin and cellulosic fibre fractions. With hot water extraction at 160°C, 10.5% of wood could be extracted, which corresponds to more than 60% of wood GGM. The purity of precipitated GGM was about 70%, the main impurities being xylan, galactan and lignin. The organosolv (OS) cooking was performed in acetic acid in the presence of phosphinic acid (the Lignofibre process, LGF). Dissolved lignin was recovered by precipitation from the cooking liquor with excess of water. Hot water extraction induced some changes to the structure of lignin dissolved in subsequent LGF cooking, probably induced by partial cleavage of the -aryl ether bonds during the hot water treatment. Lignin was altered in HWE treatment in such a way that it is more resistant to extraction both during the LGF cooking and alkaline extraction of the LGF pulp

AB - Hot water extraction was studied as pretreatment for organosolv cooking in order to fractionate wood efficiently into galactoglucomannan (GGM), lignin and cellulosic fibre fractions. With hot water extraction at 160°C, 10.5% of wood could be extracted, which corresponds to more than 60% of wood GGM. The purity of precipitated GGM was about 70%, the main impurities being xylan, galactan and lignin. The organosolv (OS) cooking was performed in acetic acid in the presence of phosphinic acid (the Lignofibre process, LGF). Dissolved lignin was recovered by precipitation from the cooking liquor with excess of water. Hot water extraction induced some changes to the structure of lignin dissolved in subsequent LGF cooking, probably induced by partial cleavage of the -aryl ether bonds during the hot water treatment. Lignin was altered in HWE treatment in such a way that it is more resistant to extraction both during the LGF cooking and alkaline extraction of the LGF pulp

KW - Hot water extraction

KW - organosolv cooking

KW - lignin

KW - glucomannan

M3 - Conference article in proceedings

SN - 978-952-10-8187-3

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BT - 12th European Workshop on Lignocellulosics and Pulp

PB - University of Helsinki

CY - Helsinki

ER -

Hyvärinen S, Hakala T, Tamminen T, Ohra-aho T, Liitiä T, Suurnäkki A. Hemicellulose and lignin fractions obtained by hot water extraction and organosolv cooking of Scots pine. In 12th European Workshop on Lignocellulosics and Pulp: EWLP 2012 : August 27-30, 2012, Espoo, Finland : Proceedings. Helsinki: University of Helsinki. 2012. p. 288-291