Aqueous acetone fractionation of kraft, organosolv and soda lignins

Juan Domínguez-Robles, Tarja Tamminen, Tiina Liitiä, Maria Soledad Peresin, Alejandro Rodríguez, Anna-Stiina Jääskeläinen

Research output: Contribution to journalArticleScientificpeer-review

32 Citations (Scopus)

Abstract

Technical lignins are structurally heterogeneous and polydisperse. This work describes the use of a simple and green method for lignin fractionation, using different proportions of acetone (40 and 60%) in water. Lignins from three different sources (wheat straw organosolv lignin, wheat straw soda lignin and softwood kraft lignin) were used in this fractionation protocol. The obtained fractions showed different molar mass and functional groups. The lower molar mass fractions showed more phenolic hydroxyl groups and carboxylic acid moieties than higher molar mass fractions, which also possessed much higher amounts of carbohydrates. The chemical characterization of these fractionated lignins showed that the PREC fraction was exceptionally pure and homogeneous lignin. Its total lignin content was >96% for all three lignins and it was practically free from carbohydrates and inorganics (ash). Furthermore, PREC fraction possessed the highest carbon content for the three lignin samples (63.05-69.26%). These results illustrate that the proposed aqueous acetone fractionation protocol could indeed produce pure and uniform lignin fraction and it was applicable for lignins from different sources.
Original languageEnglish
Pages (from-to)979-987
Number of pages9
JournalInternational Journal of Biological Macromolecules
Volume106
Early online date2017
DOIs
Publication statusPublished - 2018
MoE publication typeA1 Journal article-refereed

Fingerprint

Lignin
Fractionation
Acetone
Molar mass
Straw
Ashes
Triticum
Carbohydrates
Softwoods
Carboxylic Acids
Hydroxyl Radical
Functional groups
Carbon

Keywords

  • molar mass distribution
  • solvent fractionation
  • technical lignins

Cite this

Domínguez-Robles, Juan ; Tamminen, Tarja ; Liitiä, Tiina ; Peresin, Maria Soledad ; Rodríguez, Alejandro ; Jääskeläinen, Anna-Stiina. / Aqueous acetone fractionation of kraft, organosolv and soda lignins. In: International Journal of Biological Macromolecules. 2018 ; Vol. 106. pp. 979-987.
@article{09d11dd044a14d0595a8ac8237cb45e3,
title = "Aqueous acetone fractionation of kraft, organosolv and soda lignins",
abstract = "Technical lignins are structurally heterogeneous and polydisperse. This work describes the use of a simple and green method for lignin fractionation, using different proportions of acetone (40 and 60{\%}) in water. Lignins from three different sources (wheat straw organosolv lignin, wheat straw soda lignin and softwood kraft lignin) were used in this fractionation protocol. The obtained fractions showed different molar mass and functional groups. The lower molar mass fractions showed more phenolic hydroxyl groups and carboxylic acid moieties than higher molar mass fractions, which also possessed much higher amounts of carbohydrates. The chemical characterization of these fractionated lignins showed that the PREC fraction was exceptionally pure and homogeneous lignin. Its total lignin content was >96{\%} for all three lignins and it was practically free from carbohydrates and inorganics (ash). Furthermore, PREC fraction possessed the highest carbon content for the three lignin samples (63.05-69.26{\%}). These results illustrate that the proposed aqueous acetone fractionation protocol could indeed produce pure and uniform lignin fraction and it was applicable for lignins from different sources.",
keywords = "molar mass distribution, solvent fractionation, technical lignins",
author = "Juan Dom{\'i}nguez-Robles and Tarja Tamminen and Tiina Liiti{\"a} and Peresin, {Maria Soledad} and Alejandro Rodr{\'i}guez and Anna-Stiina J{\"a}{\"a}skel{\"a}inen",
year = "2018",
doi = "10.1016/j.ijbiomac.2017.08.102",
language = "English",
volume = "106",
pages = "979--987",
journal = "International Journal of Biological Macromolecules",
issn = "0141-8130",
publisher = "Elsevier",

}

Aqueous acetone fractionation of kraft, organosolv and soda lignins. / Domínguez-Robles, Juan; Tamminen, Tarja; Liitiä, Tiina; Peresin, Maria Soledad; Rodríguez, Alejandro; Jääskeläinen, Anna-Stiina.

In: International Journal of Biological Macromolecules, Vol. 106, 2018, p. 979-987.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Aqueous acetone fractionation of kraft, organosolv and soda lignins

AU - Domínguez-Robles, Juan

AU - Tamminen, Tarja

AU - Liitiä, Tiina

AU - Peresin, Maria Soledad

AU - Rodríguez, Alejandro

AU - Jääskeläinen, Anna-Stiina

PY - 2018

Y1 - 2018

N2 - Technical lignins are structurally heterogeneous and polydisperse. This work describes the use of a simple and green method for lignin fractionation, using different proportions of acetone (40 and 60%) in water. Lignins from three different sources (wheat straw organosolv lignin, wheat straw soda lignin and softwood kraft lignin) were used in this fractionation protocol. The obtained fractions showed different molar mass and functional groups. The lower molar mass fractions showed more phenolic hydroxyl groups and carboxylic acid moieties than higher molar mass fractions, which also possessed much higher amounts of carbohydrates. The chemical characterization of these fractionated lignins showed that the PREC fraction was exceptionally pure and homogeneous lignin. Its total lignin content was >96% for all three lignins and it was practically free from carbohydrates and inorganics (ash). Furthermore, PREC fraction possessed the highest carbon content for the three lignin samples (63.05-69.26%). These results illustrate that the proposed aqueous acetone fractionation protocol could indeed produce pure and uniform lignin fraction and it was applicable for lignins from different sources.

AB - Technical lignins are structurally heterogeneous and polydisperse. This work describes the use of a simple and green method for lignin fractionation, using different proportions of acetone (40 and 60%) in water. Lignins from three different sources (wheat straw organosolv lignin, wheat straw soda lignin and softwood kraft lignin) were used in this fractionation protocol. The obtained fractions showed different molar mass and functional groups. The lower molar mass fractions showed more phenolic hydroxyl groups and carboxylic acid moieties than higher molar mass fractions, which also possessed much higher amounts of carbohydrates. The chemical characterization of these fractionated lignins showed that the PREC fraction was exceptionally pure and homogeneous lignin. Its total lignin content was >96% for all three lignins and it was practically free from carbohydrates and inorganics (ash). Furthermore, PREC fraction possessed the highest carbon content for the three lignin samples (63.05-69.26%). These results illustrate that the proposed aqueous acetone fractionation protocol could indeed produce pure and uniform lignin fraction and it was applicable for lignins from different sources.

KW - molar mass distribution

KW - solvent fractionation

KW - technical lignins

UR - http://www.scopus.com/inward/record.url?scp=85028634593&partnerID=8YFLogxK

U2 - 10.1016/j.ijbiomac.2017.08.102

DO - 10.1016/j.ijbiomac.2017.08.102

M3 - Article

VL - 106

SP - 979

EP - 987

JO - International Journal of Biological Macromolecules

JF - International Journal of Biological Macromolecules

SN - 0141-8130

ER -