×

Process for the production of an intermediate product intended for the production of ethanol and for the production of lignin

  • US 9,328,457 B2
  • Filed: 09/10/2014
  • Issued: 05/03/2016
  • Est. Priority Date: 12/05/2008
  • Status: Active Grant
First Claim
Patent Images

1. A process for producing from a lignocellulosic raw material of:

  • (i) an intermediate product that is intended for the production of ethanol, containing polysaccharides, cellulose and hemicelluloses, and(ii) a product containing lignin in an aqueous solution without sulfur residue, this lignin could be precipitated, said process comprising;

    mixing said raw material with a first quantity of water and a strong base at a concentration of between 0.5% and 4% relative to the volume of said first quantity of water to form a mixture; and

    introducing said mixture and a second quantity of water excluding a strong base into an extruder and pulping said mixture and said second quantity in said extruder at a temperature of between 90°

    C. and 120°

    C.,wherein said first quantity and said second quantity of water represent between 300% and 400% of the mass of said raw material.

View all claims
  • 2 Assignments
Timeline View
Assignment View
    ×
    ×