Reactions of lignin – oxygen-alkali delignification

Reactions of lignin – oxygen-alkali delignification Free phenolic and enolic hydroxyl groups in the residual kraft lignin play a key role in the initial delignification reactions of oxygen delignification.1-6 The demand that these free hydroxyl groups should be also ionised explains why strongly alkaline conditions are needed to achieve appreciable delignification rates. Hence, the high
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