TY - JOUR
T1 - Novel concepts of dissolving pulp production
AU - Sixta, Herbert
AU - Iakovlev, Mikhail
AU - Testova, Lidia
AU - Roselli, Annariikka
AU - Hummel, Michael
AU - Borrega, Marc
AU - van Heiningen, Adriaan
AU - Froschauer, Carmen
AU - Schottenberger, Herwig
N1 - Funding Information:
Acknowledgments Funding from Finnish Funding Agency for Technology and Innovation (Tekes) and FiBiC (former Forestcluster Ltd.) as a part of the Future Biorefinery programme is gratefully acknowledged.
Copyright:
Copyright 2013 Elsevier B.V., All rights reserved.
PY - 2013/8
Y1 - 2013/8
N2 - Herein, we report about existing and novel dissolving pulp processes providing the basis for an advanced biorefinery. The SO2-ethanol-water (SEW) process has the potential to replace the acid sulphite process for the production of rayon-grade pulps owing to a higher flexibility in the selection of the raw material source, substantially lower cooking times, and the near absence of sugar degradation products. Special attention is paid to developments that target toward the selective and quantitative fractionation of paper-grade pulps into hemicelluloses and cellulose of highest purity. This target has been accomplished by the IONCELL process where the entire hemicellulose fraction is selectively dissolved in an ionic liquid in which the H-bond basicity and acidity are adequately adjusted by the addition of a co-solvent. At the same time, pure hemicellulose can be recovered by further addition of the co-solvent, which then acts as a non-solvent. The residual pure cellulose fraction may then enter a Lyocell process for the production of regenerated cellulose products.
AB - Herein, we report about existing and novel dissolving pulp processes providing the basis for an advanced biorefinery. The SO2-ethanol-water (SEW) process has the potential to replace the acid sulphite process for the production of rayon-grade pulps owing to a higher flexibility in the selection of the raw material source, substantially lower cooking times, and the near absence of sugar degradation products. Special attention is paid to developments that target toward the selective and quantitative fractionation of paper-grade pulps into hemicelluloses and cellulose of highest purity. This target has been accomplished by the IONCELL process where the entire hemicellulose fraction is selectively dissolved in an ionic liquid in which the H-bond basicity and acidity are adequately adjusted by the addition of a co-solvent. At the same time, pure hemicellulose can be recovered by further addition of the co-solvent, which then acts as a non-solvent. The residual pure cellulose fraction may then enter a Lyocell process for the production of regenerated cellulose products.
KW - Acid sulfite pulp
KW - Cold caustic extraction
KW - Dissolving pulp
KW - Ioncell process
KW - Ionic liquids
KW - Prehydrolysis-Kraft pulp
UR - http://www.scopus.com/inward/record.url?scp=84881030447&partnerID=8YFLogxK
U2 - 10.1007/s10570-013-9943-1
DO - 10.1007/s10570-013-9943-1
M3 - Review Article
AN - SCOPUS:84881030447
VL - 20
SP - 1547
EP - 1561
JO - Cellulose
JF - Cellulose
SN - 0969-0239
IS - 4
ER -