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The carboxymethylation of organosolv and kraft lignins

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Summary

Kraft and ethanol organosolv lignins from Picea abies and Fagus sylvatica were carboxymethylated with bromoacetic acid. Of the total hydroxyl groups in the lignins, 60–70% were carboxymethylated. The reaction led to an increase of the number-average molecular weights. The moisture adsorption of the carboxymethylated products is about one and a half as high as that of the original lignins. There are no remarkable differences between the solubilities of the treated and untreated products.

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Authors and Affiliations

  1. Ordinariat für Holztechnologie (Holzchemie) der Universität Hamburg, Hamburg, Germany

    W. Lange

  2. Institut für Holzchemie und chemische Technologie des Holzes der Bundesforschungsanstalt für Forst- und Holzwirtschaft, Hamburg-Reinbek

    W. Schweers

Authors
  1. W. Lange
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  2. W. Schweers
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Additional information

The authors wish to express their appreciation to Mr. Dietrich Meier, Federal Research Organization for Forestry and Forest Products, Hamburg, Federal Republic of Germany, for preparation and donation of lignin samples

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Lange, W., Schweers, W. The carboxymethylation of organosolv and kraft lignins. Wood Sci. Technol. 14, 1–7 (1980). https://doi.org/10.1007/BF00353458

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  • DOI: https://doi.org/10.1007/BF00353458

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