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Journal of Wood Science

Official Journal of the Japan Wood Research Society

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Analysis of progress of oxidation reaction during oxygen-alkali treatment of lignin 2: significance of oxidation reaction of lignin during oxygen delignification

Journal of Wood Science volume 46, pages 371–375 (2000)Cite this article

Abstract

The progress of lignin oxidation during oxygenalkali bleaching of pulp was evaluated by the method based on the difference between permanganate consumption of original pulp and that of the mixture of pulp and effluent after oxygen-alkali bleaching. By low-consistency oxygen bleaching of softwood kraft pulp, the permanganate consumption decreased very little. When the kappa number of the pulp was halved (from 25.4 to 13.4), the decrease in permanganate consumption of 1 g pulp was only 1.22ml of 0.02mol/l potassium permanganate. This value was smaller than that obtained for the oxygen-alkali treatment of a corresponding amount of isolated residual lignin, 6.40ml. This was not due to the slow oxidation of lignin in pulp but to the formation of permanganate-consuming substances from carbohydrates. Those newly formed substances cannot be oxidized by oxygen-alkali treatment. Taking these facts into account, lignin originally present in pulp was found to be oxidized well. Reduction of carbonyl groups in carbohydrates prevented the formation of such substances.

References

  1. Gellerstedt G, Lindfors EL (1987) Hydrophilic groups in lignin after oxygen bleaching. TAPPI J 70(6):119–122

    CAS  Google Scholar 

  2. Tong G, Yokoyama T, Matsumoto Y, Meshitsuka G (2000) Analysis of progress of oxidation reaction during oxygen-alkali treatment of lignin I: method and its application to lignin oxidation. J Wood Sci 46:32–39

    Article  CAS  Google Scholar 

  3. Froass P, Ragauskas A, McDonough T, Jiang J (1996) Chemical structure of residual lignin from kraft pulp. J Wood Chem Technol 16:347–365

    Article  CAS  Google Scholar 

  4. Timell T (1965) Galactoglucomannans from the wood of gymnosperms. Methods Carbohydrate Chem 5:134–137

    CAS  Google Scholar 

  5. Matsumoto Y, Yokoyama T, Tong G, Meshitsuka G (1997) Degradation of non-phenolic lignin unit by co-oxidation mechanism during oxygen bleaching. In: Proceedings of 9th international symposium on wood and pulping chemistry [poster presentation], Montreal, pp 68.1–68.4

  6. Koda K, Shintani H, Matsumoto Y, Meshitsuka G (1995) Role of oxidation reaction in the chlorine bleaching process [in Japanese]. In: Proceedings of 40th lignin symposium, pp 33–36

  7. Forsskåhl I, Popoff T, Theander O (1976) Reactions ofd-xylose andd-glucose in alkali aqueous solution. Carbohydr Res 48:13–21

    Article  Google Scholar 

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Authors and Affiliations

  1. Wood Chemistry Laboratory, Department of Biomaterial Sciences, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, 113-8657, Tokyo, Japan

    Guolin Tong, Yuji Matsumoto & Gyosuke Meshitsuka

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  1. Guolin Tong
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  2. Yuji Matsumoto
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  3. Gyosuke Meshitsuka
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Correspondence to Guolin Tong.

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Tong, G., Matsumoto, Y. & Meshitsuka, G. Analysis of progress of oxidation reaction during oxygen-alkali treatment of lignin 2: significance of oxidation reaction of lignin during oxygen delignification. J Wood Sci 46, 371–375 (2000). https://doi.org/10.1007/BF00776398

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  • DOI: https://doi.org/10.1007/BF00776398

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