Radical formation in peroxide-bleached kraft pulp

Journal of Pulp and Paper Science

Volumn 24, Issue 9, 1998, Pages 286-290

  Gronroos A J ^a   Pitkanen M ^b   Vuolle, M ^a  

^a UNIVERSITY OF JYVÄSKYLÄ   (Finland)

^b Metsä Serla Oy ^*  (Finland)

Author keywords

Bleached pulps; Electron spin resonance; Heating; Heavy metals; Kraft pulps; Lignin content; Peroxide bleaching; Radicals; Ultraviolet resistance

Indexed keywords

BLEACHED PULP; COMPOSITION EFFECTS; DRYING; FREE RADICALS; HYDROGEN PEROXIDE; IRON; LIGNIN; MAGNESIUM; PARAMAGNETIC RESONANCE; PHOTOCHROMISM; PULP MANUFACTURE; ULTRAVIOLET RADIATION;

ACIDIFICATION; HARDWOOD PULP; SOFTWOOD PULP;

KRAFT PULP;

EID: 0032164783     PISSN: 08266220     EISSN: None     Source Type: Journal    
DOI: None     Document Type: Article

References (18)

1. HON, D.N.-S., "Formation of Free Radicals in Photoirradiated Cellulose. VIII. Mechanism", J. Polym. Sci., Polym. Chem. Ed. 14(10):2497-2512 (1976).
2. HON, D.N.-S., "Formation of Free Radicals in Photoirradiated Cellulose. VI. Effect of Lignin", J. Polym. Sci., Polym. Chem. Ed. 13(12):2641-2652 (1975).
3. NANASSY, A.J. and DESAI, R.L., "ESR Studies on the Effect of Lignin and Gases on UV Photodegradation of Cellulose", J. Appl. Polym. Sci. 15(9):2245-2257 (1971).
4. HON, D.N.-S., "Formation of Free Radicals in Photoirradiated Cellulose. I. Effect of Wavelength", J. Polym. Sci., Polym. Chem. Ed. 13(6): 1347-1361 (1975).
5. HON, D.N.-S., "Formation of Free Radicals in Photoirradiated Cellulose. III. Effect of Photosensitizers", J. Polym. Sci., Polym. Chem. Ed. 13(8):1933-1941 (1975).
6. HON, D.N.-S., "Formation of Free Radicals in Photoirradiated Cellulose. V. Effect of Temperature", J. Polym. Sci., Polym. Chem. Ed. 13(10):2363-2374 (1975).
7. HON, D.N.-S., "Formation of Free Radicals in Photoirradiated Cellulose. II. Effect of Moisture", J. Polym. Sci., Polym. Chem. Ed. 13(4):955-959 (1975).
8. HON, D.N.-S., "Photooxidative Degradation of Cellulose: Reactions of the Cellulosic Free Radicals with Oxygen", J. Polym. Sci., Polym. Chem. Ed. 17(2):441-454 (1979).
9. HON, D.N.-S., "Fundamental Degradation Processes Relevant to Solar Irradiation of Cellulose: ESR studies", J. Macromol. Sci., Chem. 10(6): 1175-1192 (1976).
10. HON, D.N.-S., "Thermomechanical Pulp and Light - Photoactivity of α-Carbonyl Group in Solid Lignin", J. Wood Chem. Technol. 12(2): 179-196 (1992).
11. DOYLE, J.E. and LOONEY, F.D., "Electron Spin Resonance Investigation of Quinone-Assisted Soda Pulping", Appita 36(3): 219-225 (1982).
12. MATTAR, S.M. and FLEMING, B.I., "AQ Radicals in Alkaline Pulping", Tappi 64(4):136-137 (1981).
13. HOCKING, M.B., BOLKER, H.I., and FLEMING, B.I., "An Investigation of Anthraquinone-Catalysed Alkaline Pulping via Component Modeling and Electron Spin Resonance Experiments", Can. J. Chem. 58(18): 1983-1992 (1980).
14. SHEVCHENKO, S.M., ZUBAREV, V.E., and RUDENKO, A.P., "On Formation of Anthrasemiquinone in the Conditions of Wood Alkaline Pulping", Croat. Chem. Acta 61(4):763-773 (1988).
15. EK, M., "Some Aspects on the Mechanism of Photoyellowing of High-Yield Pulps", Doctoral Thesis, Stockholm, Sweden (1992).
16. PRYOR, W.A., Introduction to Free Radical Chemistry, Prentice-Hall, Eaglewood Cliffs, New Jersey, 46 (1966).
17. JANSON, J. and FORSSKÅHL, I., "Influence of Metal Ions and Complexing Agents on the Colour-Stability of Lignin-Rich Pulps", Proc. Intl. Symp. Wood Pulping Chem., 603-605, Atlanta (1989).
18. REDHARDT, A. and DASELER, W., "A New Method for Absolute Determination of Radical Concentrations of EPR" J. Biochem. Biophys. Methods 15:71-84 (1987).