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Antisolvent precipitation of hemicelluloses, lignosulfonates and their complexes from ultrafiltrated spent sulfite liquor (SSL)

Al-Rudainy, Basel LU ; Galbe, Mats LU ; Schagerlöf, Herje LU and Wallberg, Ola LU (2018) In Holzforschung 72(10). p.839-850
Abstract
The possibility of precipitating high molecular weight (MW) softwood hemicelluloses has been investigated. Solids were precipitated from a sodium-based spent sulfite liquor with the anti-solvents acetone, ethanol and methanol and the effects of solute concentration, pH and temperature on the precipitation were studied. The product yield, degree of separation, MW and structure of the different fractions were determined using gravimetric analysis, high performance liquid chromatography (HPLC), ultraviolet–visible (UV-Vis) spectroscopy, size exclusion chromatography (SEC), and two-dimensional nuclear magnetic resonance (2D NMR). A direct correlation was found between the dielectric constant (also called relative permittivity) of the bulk... (More)
The possibility of precipitating high molecular weight (MW) softwood hemicelluloses has been investigated. Solids were precipitated from a sodium-based spent sulfite liquor with the anti-solvents acetone, ethanol and methanol and the effects of solute concentration, pH and temperature on the precipitation were studied. The product yield, degree of separation, MW and structure of the different fractions were determined using gravimetric analysis, high performance liquid chromatography (HPLC), ultraviolet–visible (UV-Vis) spectroscopy, size exclusion chromatography (SEC), and two-dimensional nuclear magnetic resonance (2D NMR). A direct correlation was found between the dielectric constant (also called relative permittivity) of the bulk solution and the yield of precipitants, based on which the separation of the solutes was predictable. The highest yield and degree of separation observed was an intercept around 76% with 47.5% acetone, which was the most efficient anti-solvent. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Arabinogalactan, Dielectric Constant, Galactoglucomannan, Lignin, Lignin-carbohydrate-complex, Precipitation, Softwood, Ultrafiltration
in
Holzforschung
volume
72
issue
10
pages
839 - 850
publisher
De Gruyter
external identifiers
  • scopus:85048122922
ISSN
1437-434X
DOI
10.1515/hf-2017-0218
language
English
LU publication?
yes
id
2b3dcbe4-fbab-4cb8-a7f8-410ac0cde48a
date added to LUP
2018-06-15 15:39:48
date last changed
2019-03-19 03:56:16
@article{2b3dcbe4-fbab-4cb8-a7f8-410ac0cde48a,
  abstract     = {The possibility of precipitating high molecular weight (MW) softwood hemicelluloses has been investigated. Solids were precipitated from a sodium-based spent sulfite liquor with the anti-solvents acetone, ethanol and methanol and the effects of solute concentration, pH and temperature on the precipitation were studied. The product yield, degree of separation, MW and structure of the different fractions were determined using gravimetric analysis, high performance liquid chromatography (HPLC), ultraviolet–visible (UV-Vis) spectroscopy, size exclusion chromatography (SEC), and two-dimensional nuclear magnetic resonance (2D NMR). A direct correlation was found between the dielectric constant (also called relative permittivity) of the bulk solution and the yield of precipitants, based on which the separation of the solutes was predictable. The highest yield and degree of separation observed was an intercept around 76% with 47.5% acetone, which was the most efficient anti-solvent.},
  author       = {Al-Rudainy, Basel and Galbe, Mats and Schagerlöf, Herje and Wallberg, Ola},
  issn         = {1437-434X},
  keyword      = {Arabinogalactan,Dielectric Constant,Galactoglucomannan,Lignin,Lignin-carbohydrate-complex,Precipitation,Softwood,Ultrafiltration},
  language     = {eng},
  month        = {05},
  number       = {10},
  pages        = {839--850},
  publisher    = {De Gruyter},
  series       = {Holzforschung},
  title        = {Antisolvent precipitation of hemicelluloses, lignosulfonates and their complexes from ultrafiltrated spent sulfite liquor (SSL)},
  url          = {http://dx.doi.org/10.1515/hf-2017-0218},
  volume       = {72},
  year         = {2018},
}