Methods and systems for processing lignocellulosic materials and related compositions

• US 8,404,355 B2
• Filed: 12/09/2011
• Issued: 03/26/2013
• Est. Priority Date: 12/09/2010
• Status: Expired due to Fees

• Current Assignee: Virdia LLC (Stora Enso Oyj)
• Original Assignee: Virdia Ltd (Stora Enso Oyj)
• Inventors: Jansen, Robert, Eyal, Aharon, Lavielle, Philippe
• Primary Examiner(s): HEINCER, LIAM J
• Application Number:
  US13/316,327
• Publication Number:
  US 20120116063A1
• Time in Patent Office: 473 Days
• Field of Search: 527/103, 428/535, 162/72, 162/77
• US Class Current: 428/535
• CPC Class Codes: B01J 2219/00006 Large-scale industrial plants
• CPC Class Codes: C08B 15/00 Preparation of other cellulose derivatives or modified cellulose , e.g. complexes
• CPC Class Codes: C08H 8/00 Macromolecular compounds derived from lignocellulosic materials pretreatment thereof B27N
• CPC Class Codes: C12P 2201/00 Pretreatment of cellulosic or lignocellulosic material for subsequent enzymatic treatment or hydrolysis
• CPC Class Codes: C13K 1/02 obtained by saccharification of cellulosic materials manufacture of fodder A23K10/32
• CPC Class Codes: Y10T 428/31982 Wood or paper

Abstract

A method comprising: (a) providing a lignocellulosic substrate; (b) contacting said lignocellulosic substrate with an extractant comprising a water-soluble organic solvent to form an extracted substrate and a miscella; (c) removing miscella from said extracted substrate; and (d) hydrolyzing said extracted substrate using a chemically catalyzed process.

Claims

1. A lignocellulosic composition comprising (on a dry matter basis) cellulose, at least 7.4% by weight hemicellulose, and lignin, wherein said lignocellulosic composition is a solid, and further wherein said lignocellulosic composition comprises:

(i) lipophilic material at less than 5000 PPM;

(ii) ash at less than 2000 PPM or Ca at less than 2000 PPM;

(iii) pectin at less than 10,000 PPM;

(iv) furfural at less than 2000 PPM; and

(v) at least 10 PPM of a marker selected from the group consisting of;

hydroxy-methyl furfural, products of furfural condensation, products of hydroxy-methyl furfural condensation, color compounds derived from sugar caramelization, levulinic acid, acetic acid, methanol, galacturonic acid, glycerol, organically bound sulfur and acetone.

2. The lignocellulosic composition according to claim 1, wherein said composition has a moisture content of 5 to 30%.

3. The lignocellulosic composition according to claim 1 comprising Ca at less than 2000 PPM.

4. The lignocellulosic composition according to claim 3 comprising Ca at less than 1000 PPM.

5. The lignocellulosic composition according to claim 4 comprising Ca at less than 500 PPM.

6. The lignocellulosic composition according to claim 1 comprising furfural at less than 1000 PPM.

7. The lignocellulosic composition according to claim 5 comprising furfural at less than 500 PPM.

8. The lignocellulosic composition according to claim 1 comprising lipophilic material at less than 3000 PPM.

9. The lignocellulosic composition according to claim 8 comprising lipophilic material at less than 500 PPM.

10. The lignocellulosic composition according to claim 1 comprising pectin at less than 6000 PPM.

11. The lignocellulosic composition according to claim 10 comprising pectin at less than 1000 PPM.

12. The lignocellulosic composition according to claim 1 comprising ash at less than 500 PPM.

13. The lignocellulosic composition according to claim 1 comprising at least 35% by weight cellulose.

14. The lignocellulosic composition according to claim 1, wherein at least 10% of the cells are disrupted.

15. The lignocellulosic composition according to claim 1 comprising at least 0.01% acid selected from the group consisting of sulfurous acid, acetic acid and carbonic acid.