Efficient method for separating lignocellulosic raw material

Efficient method for separating lignocellulosic raw material

  • CN 105,507,051 A
  • Filed: 11/23/2015
  • Published: 04/20/2016
  • Est. Priority Date: 11/23/2015
  • Status: Active Application
First Claim
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1. a separation method for lignocellulose raw material, described separation method comprises the following steps:

  • 1) first by lignocellulose-like biomass mechanical crushing to suitable particle size;

    2) be that the aqueous formic acid of 70%-90% and the oxidant of 0.2%-10wt% are mixed to get pretreatment fluid by mass concentration, described oxidant is based on the weighing scale of over dry preprocessing lignocellulose biolobic material;

    3) by step

         1) in the living beings of fragmentation that obtain and step

         2) in the pretreatment fluid that obtains mix, reaction treatment 10min to 3 hour under the pressure of the temperature of 105-150 DEG C and 0-0.6MPa, according to weighing scale, the liquid-solid ratio of pretreatment fluid and living beings is 3;

    1 to 20;


    4) until step

         3) reaction terminate after, carry out Separation of Solid and Liquid by filtration after reactant being down to room temperature, wherein isolated solid portion can carry out bleaching and obtains high-purity paper pulp or cellulose products, or uses biological enzyme hydrolysis to obtain reducing sugar;

    5) step

         4) in liquid part after Separation of Solid and Liquid through Distillation recovery formic acid, the rate of recovery is more than 95%, then filter and obtain solids of sedimentation, in the solids of sedimentation obtained, add water carry out abundant stirring and dissolving, the part of dissolving is hemicellulose sugar, and then centrifugal or filtration obtains precipitation formic acid lignin.

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