Method for extracting lignin from wood fiber cell walls

Method for extracting lignin from wood fiber cell walls

  • CN 105,256,631 A
  • Filed: 09/21/2015
  • Published: 01/20/2016
  • Est. Priority Date: 09/21/2015
  • Status: Active Application
First Claim
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1. from wood fibre cell membrane, extract a method for lignin, it is characterized in that, comprise the following steps:

  • (1) pulverizing of the lignocellulose raw material of drying is obtained wood fibre powder, with benzene-ethanolic solution that volume ratio is 2;

    1, extracting is carried out to wood fibre powder, remove extract, obtain without extract wood fibre powder;

    (2) with ball mill to step (1) gained without extract wood fibre powder ball milling 8 ~ 12h, be scattered in extract, obtain the suspension of wood fibre powder, described wood fibre powder and the mass volume ratio of extract are 1;

    10 ~ 1;

    30;

    In closed container, stir 24 ~ 36h under normal temperature, extract is fully contacted with wood fibre powder, extract the lignin in wood fibre powder, isolated by filtration or centrifugation obtain the first wood fibre powder and the first solution;

    The acetone-water solution of described extract to be volume ratio be 96;

    4 ~ 90;

    10;

    (3) evaporate the first solution rotating under lower than the condition of 45 DEG C with rotary evaporator, to remove extract, obtain solid phase extraction thing after evaporation, vacuumize or freeze drying, obtain lignin.

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