Methods for producing extracted and digested products from pretreated lignocellulosic biomass
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
C12P-019/14
C13K-001/02
C08H-007/00
C08B-015/02
C08B-037/00
C12P-019/20
C12P-007/10
C08H-008/00
출원번호
US-0642052
(2011-04-19)
등록번호
US-9650657
(2017-05-16)
국제출원번호
PCT/US2011/033079
(2011-04-19)
§371/§102 date
20121217
(20121217)
국제공개번호
WO2011/133571
(2011-10-27)
발명자
/ 주소
Chundawat, Shishir
Sousa, Leonardo Da Costa
Cheh, Albert M.
Balan, Venkatesh
Dale, Bruce
출원인 / 주소
BOARD OF TRUSTEES OF MICHIGAN STATE UNIVERSITY
대리인 / 주소
Clark IP Law, PLC
인용정보
피인용 횟수 :
1인용 특허 :
70
초록▼
Methods for producing extracted and digested products from pretreated lignocellulosic biomass are provided. The methods include converting native cellulose Iβ to cellulose IIII by pretreating the lignocellulosic biomass with liquid ammonia under certain conditions, and performing extracting or diges
Methods for producing extracted and digested products from pretreated lignocellulosic biomass are provided. The methods include converting native cellulose Iβ to cellulose IIII by pretreating the lignocellulosic biomass with liquid ammonia under certain conditions, and performing extracting or digesting steps on the pretreated/converted lignocellulosic biomass.
대표청구항▼
1. A method for producing an extracted product from lignocellulosic biomass comprising: completely converting native cellulose Iβ to cellulose IIII by pretreating the lignocellulosic biomass with anhydrous liquid ammonia or liquid ammonia comprising a solution of at least 80% ammonia at a temperatur
1. A method for producing an extracted product from lignocellulosic biomass comprising: completely converting native cellulose Iβ to cellulose IIII by pretreating the lignocellulosic biomass with anhydrous liquid ammonia or liquid ammonia comprising a solution of at least 80% ammonia at a temperature from about 50° C. to about 140° C. and at atmospheric pressure or higher to generate a pretreated lignocellulosic biomass, wherein the lignocellulosic biomass has a moisture content of less than 20% and a weight ratio of liquid ammonia to lignocellulosic biomass is 3:1 to 8:1, wherein the pretreated lignocellulosic biomass contains lignin and/or hemicellulose; andextracting at least a portion of the lignin and/or hemicellulose from said pretreated lignocellulosic biomass to produce said extracted product and a pretreated biomass product, wherein said extracted product contains said lignin and/or hemicellulose. 2. The method of claim 1, wherein the solution further comprises a solvent. 3. The method of claim 2, wherein the solvent is water or an organic solvent. 4. The method of claim 3, wherein the organic solvent is selected from acetone, ethanol, methanol, isopropanol, dichloromethane, methyl acetate, ethyl acetate, chloroform and combinations thereof. 5. The method of claim 1, wherein the lignocellulosic biomass is pretreated with the liquid ammonia for 1 minute to 3 hours. 6. The method of claim 1, wherein the temperature is from about 50° C. to about 120° C. 7. The method of claim 1, wherein the lignin is one of a plurality of plant cell wall components which are extracted in the extracting step. 8. The method of claim 7, wherein said plant cell wall components further include hemicellulose, arabinan, and combinations and degradation products thereof. 9. The method of claim 1, wherein glucan and xylan are retained with the pretreated biomass. 10. The method of claim 1, wherein the extracting step is performed simultaneously with the anhydrous liquid ammonia pretreatment. 11. The method of claim 1, wherein the extracting step is performed after the anhydrous liquid ammonia pretreatment. 12. The method of claim 1, further comprising digesting the pretreated biomass with a combination of enzymes. 13. The method of claim 12, wherein the combination of enzymes comprises at least one exocellulase, at least one endocellulase and/or beta-glucosidase. 14. The method of claim 13, wherein the combination of enzymes comprises Cel7A (Cellobiohydrolase I), Cel6A (Cellobiohydrolase II) and Cel7B (EG I), each of which are from Trichoderma (T.) reesei. 15. The method of claim 14, wherein the combination of enzymes further comprises Cel5A_tr, from T. reesei, Cel5A_ac from Acidothermus cellulolyticum, or a combination thereof. 16. The method of claim 15, wherein the combination of enzymes further comprises cellulase Cel12A, Cel61A, or Cel61B, each of which are from T. reesei or a combination thereof. 17. The method of claim 1, further comprising an enzymatic hydrolysis step to hydrolyze the pretreated biomass product, wherein said enzymatic hydrolysis step proceeds at a rate that is at least 1.5 times faster than a hydrolysis step performed using plant biomass that has not been pretreated with the liquid ammonia. 18. The method of claim 1, further comprising recycling the liquid ammonia in a batch mode, a semi-batch mode or continuously. 19. The method of claim 1, further comprising reusing the liquid ammonia to pretreat another batch of lignocellulosic biomass. 20. The method of claim 2, further comprising recycling the solvent in a batch mode, a semi-batch mode or continuously. 21. The method of claim 2, further comprising reusing the solvent to pretreat another batch of lignocellulosic biomass. 22. The method of claim 1, wherein the product is a biofuel. 23. The method of claim 1, wherein the extracted product is converted to a bioproduct comprising a resin, a polymer, a biofuel, a biochemical, heat and/or electricity. 24. The method of claim 1, wherein the liquid ammonia is combined with acetone. 25. The method of claim 24, wherein the liquid ammonia to acetone volume:volume ratio ranges from 10:90 to 99:1. 26. A method for producing a digested product from lignocellulosic biomass comprising: completely converting native cellulose Iβ to cellulose IIII by pretreating the lignocellulosic biomass with anhydrous liquid ammonia or liquid ammonia comprising a solution of at least 80% ammonia at a temperature from about 50° C. to about 140° C. and at atmospheric pressure or higher to generate a pretreated biomass, wherein the lignocellulosic biomass has a moisture content less than 20% and a weight ratio of liquid ammonia to lignocellulosic biomass is 3:1 to 8:1, wherein the pretreated lignocellulosic biomass contains lignin and/or hemicellulose; anddigesting the pretreated biomass with a combination of enzymes to produce fermentable sugars, wherein the combination of enzymes comprises at least one exocellulase, at least one endocellulase and/or beta-glucosidase. 27. The method of claim 1 wherein the pretreated biomass product comprises a cellulose-rich solids fraction and a liquid fraction. 28. The method of claim 27 wherein the plant biomass also contains hemicellulose and the cellulose rich solids fraction in the pretreated biomass product is separated from the hemicellulose and the lignin.
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