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Process for producing bio-based product from straw hemicellulose and fully utilizing the components thereof

  • US 9,309,577 B2
  • Filed: 01/28/2011
  • Issued: 04/12/2016
  • Est. Priority Date: 01/28/2011
  • Status: Active Grant
First Claim
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1. A process for producing a bio-based product from straw hemicellulose, comprising the steps of:

  • 1) pretreating straw, wherein the straw is soaked in water, wherein a mass ratio of straw to water is from 1;

    1 to 1;

    3, a soaking temperature is from 15°

    C. to 90°

    C., and a soaking period is from 10 mins to 60 mins;

    2) conducting steam explosion, wherein the straw soaked in step

         1) is fed into a steam-explosion tank, and maintained under a steam-explosion pressure for a steam-explosion period;

    then a steam-exploded straw material is released, wherein a steam-explosion pressure is from 0.3 MPa to 2.0 MPa, and a pressure maintenance period is from 1 min to 10 mins;

    3) performing an acid treatment, wherein the steam-exploded straw material obtained in step

         2) is fed into an acid-hydrolysis tank pre-filled with a 0.8 to 1.6 wt % dilute acid and subjected to acid hydrolysis to generate a hydrolyzed material, wherein in the acid-hydrolysis tank, a mass ratio of the steam-exploded straw to the dilute acid is from 1;

    2 to 1;

    7, a reaction temperature is from 75°

    C. to 105°

    C., and a reaction time is from 10 mins to 60 mins; and

    4) collecting the product thus obtained, wherein after the acid hydrolysis in step

         3), the hydrolyzed material obtained in step

         3) is filtered to generate a hydrolyzate liquid, and a hydrolysis residue is collected and extruded using an extruder to obtain a solid material.

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