The carboxymethylation of organosolv and kraft lignins

descriptionPublicationkeyboard_double_arrow_right Article 01 Jan 1980 English Publisher:Springer Science and Business Media LLCJournal:Wood Science and Technology, volume 14, pages 1-7 (issn: 0043-7719, eissn: 1432-5225,

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Authors: W. Lange; W. Schweers;

doi: 10.1007/bf00353458

The carboxymethylation of organosolv and kraft lignins

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Abstract

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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