Skip to content
Licensed Unlicensed Requires Authentication Published by De Gruyter July 18, 2006

Upgrading of paper-grade pulps to dissolving pulps by nitren extraction: Optimisation of extraction parameters and application to different pulps

Ron Janzon, Jürgen Puls and Bodo Saake
From the journal

Abstract

Xylans were selectively removed from paper-grade pulps by nitren extraction to produce dissolving pulps. Extraction parameters were optimised for a birch kraft pulp regarding time, temperature, liquor/pulp ratio, and total nitren charge. Furthermore, the applicability of the method was investigated for two other kraft pulps obtained from eucalyptus and mixed softwood, and for one beech sulfite pulp. Extracted pulps were characterised regarding their carbohydrate content and Cuen viscosity. The nitren charge was a decisive factor for xylan removal and pulp purity. The combination of a high nitren concentration and low liquor/pulp ratio was most effective for xylan removal. However, a high liquor/pulp ratio with a lower nitren concentration proved to be more selective and minimised cellulose degradation as well. Glucomannans were almost insoluble under the extraction conditions investigated. Therefore, softwood pulps were not suitable for the upgrading of chemical pulps to dissolving pulps by nitren extraction. On the other hand, hardwood pulps obtained by kraft and sulfite processes contained 96–97% cellulose after nitren extraction.

:

Corresponding author. Federal Research Centre of Forestry and Forest Products, Institute for Wood Chemistry and Chemical Technology of Wood, D-21031 Hamburg, Germany

References

Burger, J., Kettenbach, G., Klüfers, P. (1995) Coordination equilibria in transition metal based cellulose solvents. Macromol. Symp.99:113–126.10.1002/masy.19950990113Search in Google Scholar

Claus, I., Kordsachia, O., Schröder, N., Karstens, T. (2004) Monoethanolamine (MEA) pulping of beech and spruce wood for production of dissolving pulp. Holzforschung58:573–580.10.1515/HF.2004.110Search in Google Scholar

Christov, L.P., Prior, B.A. (1996) Repeated treatments with Aureobasidium pullulans hemicellulases and alkali enhanced biobleaching of sulphite pulps. Enzyme Microb. Technol.18:244–250.10.1016/0141-0229(95)00058-5Search in Google Scholar

Fengel, D., Wegner, G. Wood – Chemistry, Ultrastructure, Reactions. Walter de Gruyter, Berlin, 1984.10.1515/9783110839654Search in Google Scholar

Hinck, J.F., Casebier R.L., Hamilton J.K. (1985) Dissolving pulp manufacture. In: Pulp and Paper Manufacture, Vol. 4. Sulfite Science & Technology. Eds. Ingruber, O.V., Kocurek, M.J., Wang, M. Tappi Press, Atlanta, GA. pp. 213–243.Search in Google Scholar

Hoyland, R.W. (1978) Swelling during penetration of aqueous solutions into paper. In: Fibre Water Interactions in Paper-making. BPBIF, London. pp. 557–577.Search in Google Scholar

Kettenbach, G. (1997) Kohlenhydratkomplexe mit Nickel(II) und Palladium(II). PhD thesis, University Karlsruhe.Search in Google Scholar

Kettenbach, G., Stein, A. (2002) Verfahren zur Abtrennung von Hemicellulosen aus hemicellulosehaltiger Biomasse sowie die mit dem Verfahren erhältliche Biomasse und Hemicellulose. German patent DE 10109502 A1.Search in Google Scholar

Kettenbach, G., Klüfers, P., Mayer, P. (1997) Deprotonation patterns of disaccharides in coordinating cellulose solvents: a status report. Macromol. Symp.120:291–301.10.1002/masy.19971200129Search in Google Scholar

Kibblewhite, R.P., Brookes, D. (1976) Distribution of chemical components in the walls of kraft and bisulphite pulp fibres. Wood Sci. Technol.10:39–46.10.1007/BF00376383Search in Google Scholar

Kordsachia, O., Patt, R., Sixta, H. (1999) Cellulosegewinnung aus verschiedenen Rohstoffen. Das Papier53:96–108.Search in Google Scholar

Nimz, H.H., Schöne, M. (1992) Holzaufschluß mit Essigsäure unter Zusatz von Ameisensäure. German patent DE 4228171.Search in Google Scholar

Patt, R., Wang D. (1987) Qualitätsbeurteilung von Chemiezellstoffen. Teil 2: Alkalilöslichkeit und Gesamtzuckeranalyse. Das Papier41:7–12.Search in Google Scholar

Puls, J., Lin, J.L., Körner, H.-U. (1987) Non-traditional analytical techniques and enzymatic treatments of pulps. In: Proceedings of the Tappi International Dissolving Pulps Conference. Tappi Press, Atlanta, GA. pp. 39–42.Search in Google Scholar

Puls, J., Saake, B., Horn, H., Knuth, L.-U., Vila, C., Parajo, J.C. (2003) Corrosion study for the acidic organosolv processes Acetosolv, Formacell and Milox. Afinidad LX505:233–238.Search in Google Scholar

Rantanen, T., Sihtola, H. (1977) Preparation of dissolving pulp by sulphate cooking without prehydrolysis. In: Proceedings of the Tappi 4th International Dissolving Pulps Conference. Tappi Press, Atlanta, GA. pp. 101–112.Search in Google Scholar

Rydholm S.A. Pulping Processes. Interscience Publishers, John Wiley & Sons, New York, 1965.Search in Google Scholar

Saalwächter, K., Burchard, W., Klüfers, P., Kettenbach, G., Mayer, P., Klemm, D., Dugarmaa, S. (2000) Cellulose solutions in water metal complexes. Macromolecules33:4094–4107.10.1021/ma991893mSearch in Google Scholar

Schild, G. (1994) Vergleich von Verfahren zur Herstellung von Chemiezellstoffen aus Buchen- und Eukalyptusholz. PhD thesis, Hamburg University.Search in Google Scholar

Scott, R.W. (1984) Hemicellulose distribution in pulp fibers and alkaline extraction rates. J. Wood Chem. Technol.4:199–218.10.1080/02773818408081153Search in Google Scholar

Sihtola, H. (1976) The SINI viscose process. Pap. Puu58:534–538.Search in Google Scholar

Sihtola, H., Rantanen, T. (1972) Chemistry of the SINI viscose process. Cell. Chem. Technol.6:71–83.Search in Google Scholar

Sinner, M., Puls, J. (1978) Non-corrosive dye reagent for detection of reducing sugars in borate complex ion-exchange chromatography. J. Chromatogr.156:197–204.10.1016/S0021-9673(00)83140-4Search in Google Scholar

Sinner, M., Simatupang, M.H., Dietrichs H.H. (1975) Automated quantitative analysis of wood carbohydrates by borate complex ion exchange chromatography. Wood Sci. Technol.9:307–322.10.1007/BF00353480Search in Google Scholar

Sixta, H., Harms, H., Dapia, S., Parajo, J.C., Puls, J., Saake, B., Fink, H.-P., Röder, T. (2004) Evaluation of new organosolv dissolving pulps. Part I: Preparation, analytical characterization and viscose processability. Cellulose11:73–83.Search in Google Scholar

Sundquist, J. (1996) Chemical pulping based on formic acid – Summary of Milox research. Pap. Puu78:92–95.Search in Google Scholar

Tappi useful method (1982) UM 246. Micro kappa number.Search in Google Scholar

Timell, T.E. (1967) Recent progress in the chemistry of wood hemicelluloses. Wood Sci. Technol.1:45–70.10.1007/BF00592255Search in Google Scholar

Zellcheming (1961) Merkblatt IV/36/61. Bestimmung der Grenzviskositätszahl (GVZ) von Cellulose in Kupferethylendiamin-Lösung (Cuen).Search in Google Scholar

Zellcheming (1967) Merkblatt IV/39/67. Beständigkeit von Zellstoff gegen Natronlauge (Alkaliresistenz).Search in Google Scholar

Zeronian, S.H., Cabradilla, K.E. (1973) Further studies on the action of alkali metal hydroxides on cotton. J. Appl. Polym. Sci.17:539–552.10.1002/app.1973.070170217Search in Google Scholar

Published Online: 2006-07-18
Published in Print: 2006-07-01

©2006 by Walter de Gruyter Berlin New York