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Bulletin of Botanical Research ›› 2016, Vol. 36 ›› Issue (1): 151-155.doi: 10.7525/j.issn.1673-5102.2016.01.022

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Hydroxymethylation of Lignin from Ethanol Pulping

LU Qi1,2;MENG Yong-Bin1,2;XU Lei1,2;ZHANG Zi-Dong1,2;LIU Ying1,2;MENG Qing-Huan1,2;ZU Yuan-Gang1,2*   

  1. 1.National Local Joint Engineering Laboratory for Ecological utilization of biological resources,Harbin 150040;
    2.Key Laboratory of Forest Plant Ecology,Northeast Forestry University,Ministry of Education,Harbin 150040
  • Online:2016-01-15 Published:2016-05-18

Abstract: We extracted the lignin by ethanol method, with the residues of Acanthopanax root and stem as raw materials. By single factor and orthogonal experiments, the optimum of ethanol lignin hydroxymethylation alkali dose of 2.0%, reaction temperature of 80℃, reaction time of 3.5 h, and mass ratio of kraft lignin to formaldehyde of 3∶1. The modified lignin reached 11.56% hydroxymethyl groups and 0.257% free formaldehyde.

Key words: lignin, ethanol lignin, ethanol, hydroxymethylation