Structural changes in residual kraft pulp lignins. Effects of kappa number and degree of oxygen delignification

Nordic Pulp and Paper Research Journal

Volumn 18, Issue 4, 2003, Pages 395-399

  Rööst, Camilla ^a   Lawoko, Martin ^b   Gellerstedt, Göran ^b  

^a Technical Department   (Sweden)

^b ROYAL INSTITUTE OF TECHNOLOGY   (Sweden)

Author keywords

Bleachability; Kappa number; Kraft pulping; Lignin content; NMR analysis; Oxygen delignification; Phenols; TCF bleaching

Indexed keywords

AUTOCLAVES; BLEACHING; CONCENTRATION (PROCESS); DELIGNIFICATION; LIGNIN; NUCLEAR MAGNETIC RESONANCE; OXIDATION; OXYGEN; SOFTWOODS; STRUCTURE (COMPOSITION);

KAPPA NUMBERS;

KRAFT PULP;

AUTOCLAVES; BLEACHING; CONCENTRATING; DELIGNIFICATION; NUCLEAR MAGNETIC RESONANCE;

EID: 1642536313     PISSN: 02832631     EISSN: None     Source Type: Journal    
DOI: 10.3183/npprj-2003-18-04-p395-399     Document Type: Article

References (22)

1. Dahlman, O., Rydlund, A., and Lindquist, A. (1997): Characterization of carbohydrates from chemical pulps using capillary electrophoresis and MALDI-TOF-MS. 9th International Symposium on Wood and Pulping Chemistry, Montreal, Canada. Proceedings, Vol. 1, Paper L5-1.
2. Gellerstedt, G. and Gustafsson, K. (1987): Structural changes in lignin during kraft cooking. Part 5. Analysis of dissolved lignin by oxidative degradation. J. Wood Chem. Technol. 7, 65-80.
3. Gellerstedt G., Gustafsson, K. and Lindfors, E-L. (1986): Structural changes in lignin during oxygen bleaching. Nordic Pulp Pap. Res. J. 1:3, 14-17.
4. Gellerstedt, G., Heuts, L. and Robert, D. (1999): Structural changes in lignin during a totally chlorine free bleaching sequence. Part II. An NMR study. J. Pulp Pap. Sci. 25, 111-117.
5. Gellerstedt, G and Lindfors, E-L. (1987): Hydrophilic groups in lignin after oxygen bleaching. Tappi J. 70:6, 119-122.
6. Gellerstedt, G. and Lindfors, E-L. (1984): Structural changes in lignin during kraft cooking. Part 4. Phenolic hydroxyl groups in wood and kraft pulps. Svensk Papperstidn. 87, R115-R118.
7. Gellerstedt, G., Pranda, J. and Lindfors, E-L. (1994): Structural and molecular properties of residual birch kraft lignins. J. Wood Chem. Technol. 14, 467-482.
8. Gellerstedt, G. and Wafa Al-Dajani, W. (2003): Some factors affecting the brightness and TCF-bleachability of kraft pulp. Nordic Pulp Pap. Res. J. 18, 56-62.
9. Hausalo, T. (1995): Analysis of wood and pulp carbohydrates by anion exchange chromatography with pulsed amperometric detection. 10th International Symposium on Wood and Pulping Chemistry, Helsinki, Finland. Proceedings, Vol. 3, p 131-136.
10. Heuts, L. and Gellerstedt, G. (1998): Oxidation of guaiacylglycerol-b-guaiacyl ether with alkaline hydrogen peroxide in the presence of kraft pulp. Nordic Pulp Pap. Res. J. 13, 107-111.
11. Johansson, E. and Ljunggren, S. (1994): The kinetics of lignin reactions during oxygen bleaching. Part 4. The reactivities of different lignin model compounds and the influence of metal ions on the rate of degradation. J. Wood Chem. Technol. 14, 507-525.
12. Kubelka, P. and Munk, F. (1931): Ein beitrag zur Optik der Farbenanstriche, Z. Tech. Physic 12, 593
13. Lai, Y.-Z. (1992): "Determination of phenolic hydroxyl groups". In Methods in Lignin Chemistry (Lin, S.Y and Dence, C. Eds.), Springer-Verlag, p. 423-434.
14. Li, J. and Gellerstedt, G. (1997): The contribution to kappa number from hexenuronic acid groups in pulp xylan, Carbohydr. Res. 302, 213-218.
15. Li, J., Sevastyanova, O. and Gellerstedt, G. (2002): The distribution of oxidizable structures in ECF- and TCF-bleached kraft pulps. Nordic Pulp pap. Res. J. 17, 415-419.
16. Lindgren, C.T. and Lindström, M.E. (1996): The kinetics of residual delignification and factors affecting the amount of residual lignin during kraft pulping, J. Pulp Pap. Sci. 22, J290-J295.
17. Rööst, C., Larsson, P and Gellerstedt, G. (2000): Brightness and Kappa number - important variables to secure appropriate control of chemical charges in TCF- and ECF- bleaching sequences. Nordic Pulp Pap. Res. J. 15, 216-220.
18. Sjöström, K. (1998) Kraft cooking with varying alkali concentration - Influence on TCF-bleachability, Nordic Pulp Pap. Res. J. 13, 57-63.
19. Steffes, F., Bokström, M. and Nordén, S. (1998): Pulp yield improvements using two-stage, extended oxygen delignification, Breaking the Pulp Yield Barrier Symposium, Atlanta, GA, USA, Proceedings, p. 183.
20. Sun Y. and Argyropoulus D.S. (1995) Fundaments of high-pressure oxygen and low pressure oxygen-peroxide (Eop) delignification of softwood and hardwood pulps. J. Pulp Pap. Sci. 21, J185-J190.
21. Wafa Al-Dajani, W and Gellerstedt, G. (2002): On the isolation and structure of softwood residual lignins. Nordic Pulp Pap. Res. J. 17, 193-198.
22. Zhang, L and Gellerstedt G. (2000) Achieving quantitative assignment of lignin structure by combining 13C and HSQC NMR techniques. Sixth European Workshop on Lignocellulosics and Pulp, Bordeaux, France. Proceedings, p 7-10.