- Patent Number:
12203,215
- Appl. No:
18/326593
- Application Filed:
May 31, 2023
- نبذة مختصرة :
The present invention relates to a process for producing a lignin composition, which process comprises: providing a lignin slurry comprising water and a water miscible organic solvent; subjecting the lignin slurry to extraction at an extraction temperature of less than 100° C. for an extraction time of at least 1 minute to provide an extracted slurry; removing liquid from the extracted slurry to provide an extracted lignin; and suspending the extracted lignin in a polar organic solvent to provide a lignin composition having a dry matter content of at least 30% by weight. The present invention also relates to a lignin composition comprising hardwood Kraft lignin and a polar organic solvent, which composition has a dry matter content of at least 30% by weight. The present invention also relates to use of the lignin composition as a fuel.
- Inventors:
KØBENHAVNS UNIVERSITET (København K, DK)
- Assignees:
KØBENHAVNS UNIVERSITET (København K, DK)
- Claim:
1. A process for producing a lignin composition, which process comprises: providing a lignin slurry comprising water and a water miscible organic solvent; subjecting the lignin slurry to extraction at an extraction temperature of 10° C. to 40° C. for an extraction time of at least 1 minute to provide an extracted slurry; removing liquid from the extracted slurry to provide an extracted lignin; and suspending the extracted lignin in a polar organic solvent to provide a lignin composition having a dry matter content of at least 30% by weight.
- Claim:
2. The process according to claim 1 , wherein the lignin is obtained from one or more of a Kraft process, hardwood Kraft process, sulphite process, soda process, second generation bioethanol fermentation process, biorefinery process, cellulase enzyme treatment process, and hemicellulase enzyme treatment lignin.
- Claim:
3. The process according to claim 1 , wherein the lignin slurry is obtained by: suspending a lignin in water to form an aqueous lignin slurry; and mixing the aqueous lignin slurry with a water miscible organic solvent; wherein the aqueous lignin slurry has a water content in the range of 20 to 50% by weight.
- Claim:
4. The process according to claim 1 , wherein the lignin slurry has a weight ratio of water to water miscible organic solvent of 1:1 to 1:30.
- Claim:
5. The process according to claim 1 , wherein the water miscible organic solvent and the polar organic solvent are independently selected from methanol, ethanol, or a mixture thereof.
- Claim:
6. The process according to claim 1 , wherein the extraction is carried out at atmospheric pressure.
- Claim:
7. The process according to claim 1 , wherein the extracted slurry formed contains a light fraction of lignin and a precipitate, the precipitate being separated from the light fraction, whereby the light fraction of lignin remains in the extracted slurry.
- Claim:
8. The process according to claim 1 , wherein the liquid is removed from the extracted slurry by evaporation at a temperature in the range of 30 to 60° C.
- Claim:
9. The process according to claim 1 , wherein the evaporated water miscible organic solvent is recycled in the process for providing a lignin slurry comprising water and a water miscible organic solvent.
- Claim:
10. The process according to claim 1 , wherein a pH adjusting agent is present in the lignin slurry subjected to extraction.
- Claim:
11. The process according to claim 1 , wherein the lignin composition is obtained in a yield of 40 to 90%.
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- Other References:
International Search Report and Written Opinion dated Feb. 23, 2022 for International Application No. PCT/EP2021/082565. cited by applicant
European Extended Search Report dated May 11, 2021 for European Application No. 20211032.6. cited by applicant
Cabrera et al: “Purification of Biorefinery Lignin with Alcohols”, Journal of Wood Chemistry and Technology, Mar. 1, 2016. cited by applicant
Larsen et al: “Inbicon makes lignocellulosic ethanol a commercial reality” (vol. 46, 2012, pp. 36-45), Apr. 20, 2012. cited by applicant
Hansen et al: “Structural and chemical analysis of process residue from biochemical conversion of wheat straw (Triticum aestivum L.) to ethanol”, vol. 56, 2013, pp. 572-581, Jul. 4, 2013. cited by applicant
Ma Jesus De La Torre et al: “Organosolv lignin for biofuel”, Industrial Crops and Products (2013), vol. 45, pp. 58-63, Dec. 2, 2012. cited by applicant
Nielsen, J. B et al: “Valorization of lignin from biorefineries for fuels and chemicals”, Jan. 1, 2016. cited by applicant
- Primary Examiner:
McAvoy, Ellen M
- Attorney, Agent or Firm:
EIP US LLP
- الرقم المعرف:
edspgr.12203215
Processing Request
No Comments.