METHOD FOR PRODUCING INTERMEDIATE MATERIAL INTENDED FOR ETHANOL PRODUCTION, AND RESULTING INTERMEDIATE MATERIAL

• US 20110236944A1
• Filed: 12/04/2009
• Published: 09/29/2011
• Est. Priority Date: 12/05/2008
• Status: Abandoned Application

• Current Assignee: valagro carbone renouvelable poitou charentes
• Original Assignee: valagro carbone renouvelable poitou charentes
• Inventors: Soum, Stephane, Barbier, Jacques, Bataille, Frederic, Briand, Alexandre
• Application Number:
  US13/133,059
• Publication Number:
  US 20110236944A1
• Time in Patent Office: Days
• US Class Current: 435/165
• CPC Class Codes: C12P 7/10 substrate containing cellulosic material
• CPC Class Codes: Y02E 50/10 Biofuels, e.g. bio-diesel

Abstract

A process for the production of an intermediate product from a lignocellulosic raw material that is intended for the production of ethanol, which process includes pulping the raw material in an extruder at a temperature of between 60° C. and 180° C., in the presence of a quantity of water that represents between 200% and 450% of the mass of the raw material and preferably in the presence of a strong acid or a strong base that is weakly concentrated. An intermediate product can be obtained by this process for producing ethanol.

Claims

1. Process for the production of an intermediate product from a lignocellulosic raw material that is intended for the production of ethanol, characterized in that it consists in pulping said raw material in an extruder at a temperature of between 60°

C. and 180°

C. and in the presence of a quantity of water that represents between 200% and 450% of the mass of said raw material.

2. Process according to claim 1, wherein it consists in pulping the raw material in an extruder at a temperature of between 60°

C. and 180°

C., in the presence of a quantity of water that represents between 200% and 450% of the mass of said raw material, and in the presence of a strong acid or a strong base at a concentration of between 0.5% and 4% relative to the volume of water.

3. Process according to claim 2, wherein the concentration of strong acid or strong base relative to the volume of water is between 0.5 and 1.5%.

4. Process according to claim 1, wherein the temperature is between 90°

C. and 120°

C.

5. Process according to claim 4, wherein the temperature is between 100°

C. and 110°

C.

6. Process according to claim 1, wherein the quantity of water represents between 300% and 400% of the mass of the lignocellulosic raw material.

7. Process according to claim 1, wherein the lignocellulosic raw material is pulped in a twin-screw extruder.

8. Process according to claim 1, wherein it comprises the following stages:

Mixing the lignocellulosic raw material with a quantity of water that represents 200% of its mass with a strong acid or a strong base that is concentrated at 1% relative to the volume of water,

Introducing this mixture into an extruder at a temperature of 105°

C.,

Adding a quantity of water that represents between 0% and 200% of the mass of said lignocellulosic raw material into the case of the extruder during the extrusion phase.

9. Intermediate product that is intended for the production of ethanol, able to be obtained by the process according to claim, 1.

10. Use of the intermediate product according to claim 9 for producing ethanol.