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Chemistry and Industry of Forest Products ›› 2018, Vol. 38 ›› Issue (4): 35-40.doi: 10.3969/j.issn.0253-2417.2018.04.006

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Regulating Effect of P-factor on Lignin Mass Concentration in Prehydrolysis Liquor of Triploid Poplar

FENG Nianjie1,2, WANG Jiming1, XIE Yimin1,2, YANG Xin3, LIU Da'an3   

  1. 1. Research Institute of Pulp & Paper Engineering, Hubei University of Technology, Wuhan 430068, China;
    2. Hubei Provincial Key Laboratory of Green Materials for Light Industry, Hubei University of Technology, Wuhan 430068, China;
    3. China Tobacco Hubei Industrial LLC, Wuhan 430040, China
  • Received:2018-01-17 Online:2018-08-25 Published:2018-08-10

Abstract: In order to regulate the lignin mass concentration in prehydrolysis liquor, the mass concentrations of Klason lignin and acid-soluble lignin in the prehydrolysis liquor of triploid poplar were studied at different P-factor. The results showed that there was a regulating effect of P-factor on lignin mass concentration in poplar prehydrolysis liquor. The increasing processes of the mass concentration of two kinds of lignins were both divided into a fast phase (P-factor <1 200) and a following slow phase (P-factor >1 200). The mass concentration ratio of Klason lignin to acid-soluble lignin(r) was revealed at (0.50±0.03). The prehydrolysis lignin in the form of lignin-carbohydrate complex was found at P-factor <306. Klason lignin fragmentation and pseudo lignin formation were obviously indicated at P-factor>691.

Key words: prehydrolysis, P-factor, lignin mass concentration, triploid poplar, regulating effect

CLC Number: