Methods for treating lignocellulosic materials
View Patent ↗The present invention relates to methods of processing lignocellulosic material to obtain hemicellulose sugars, cellulose sugars, lignin, cellulose and other high-value products. Also provided are hemicellulose sugars, cellulose sugars, lignin, cellulose, and other high-value products.
1. A hemicellulose sugar mixture comprising:
xylose in a ratio to total dissolved sugars >0.40 weight/weight;
fructose in a ratio to total dissolved sugars <0.10 weight/weight; and
one or more of the following:
galactose in a ratio to total dissolved sugars <0.05 weight/weight; and
mannose in a ratio to total dissolved sugars <0.05 weight/weight.
2. The mixture of claim 1 , further comprising oligosaccharides in a ratio to total dissolved sugars of <0.10 weight/weight.
3. The mixture of claim 1 , wherein the ratio of the xylose to total dissolved sugars is >0.60 weight/weight.
4. The mixture of claim 1 , wherein the ratio of the xylose to total dissolved sugars is >0.80 weight/weight.
5. The mixture of claim 1 , further comprising furfurals in an amount up to 0.01% weight/weight.
6. The mixture of claim 1 , further comprising phenols in an amount up to 500 ppm.
7. The mixture of claim 3 , comprising:
furfurals in an amount up to 0.01% weight/weight;
phenols in an amount up to 500 ppm; and
hexanol in an amount up to 0.1% weight/weight.
8. A hemicellulose sugar mixture comprising:
monosaccharides in a ratio to total dissolved sugars >0.50 weight/weight;
glucose in a ratio to the monosaccharides <0.25 weight/weight;
xylose in a ratio to the monosaccharides >0.18 weight/weight;
fructose in a ratio to the monosaccharides between 0.01 and 0.10 weight/weight; and
one or more of the following:
furfurals in an amount up to 0.01% weight/weight;
one or more phenols in an amount up to 500 ppm; and
hexanol in an amount up to 0.1% weight/weight.
9. The mixture of claim 8 , wherein the ratio of the monosaccharides to total dissolved sugars is >0.90 weight/weight.
10. The mixture of claim 8 , wherein the ratio of the glucose to the monosaccharides is <0.15 weight/weight.
11. The mixture of claim 8 , wherein the ratio of the xylose to the monosaccharides is >0.50 weight/weight.
12. The mixture of claim 8 , wherein the ratio of the xylose to the monosaccharides is >0.70 weight/weight.
13. The mixture of claim 8 , wherein the ratio of the fructose to the monosaccharides is >0.02 weight/weight.
14. The mixture of claim 8 , comprising furfurals in an amount up to 0.01% weight/weight.
15. The mixture of claim 8 , comprising phenols in an amount up to 500 ppm.
16. The mixture of claim 8 , further comprising:
metals or inorganics selected from the group consisting of Ca, Cu, Fe, K, Mg, Mn, Na, S and P in an amount up to 100 ppm each relative to total dissolved sugars;
lignocellulose degradation products selected from the group consisting of furfural, levulinic acid, and formic acid in an amount up to 1.5% weight/weight; and
acetic acid in an amount up to 0.035% weight/weight.
17. A hemicellulose sugar mixture comprising:
oligosaccharides in a ratio to total dissolved sugars >0.15 weight/weight;
the sum of glucose and fructose in a ratio to total dissolved sugars >0.10 weight/weight;
xylose in a ratio to total dissolved sugars <0.40 weight/weight; and
one or more of the following:
mannose in a ratio to total dissolved sugars >0.01 weight/weight;
fructose in a ratio to total dissolved sugars <0.10 weight/weight;
furfurals in an amount up to 0.01% weight/weight;
phenols in an amount up to 500 ppm; and
hexanol in an amount up to 0.1% weight/weight.
18. The mixture of claim 17 , wherein the ratio of the oligosaccharides to total dissolved sugars is >0.20 weight/weight.
19. The mixture of claim 17 , wherein the ratio of the sum of the glucose and the fructose to total dissolved sugars is >0.20 weight/weight.
20. The mixture of claim 17 , comprising furfurals in an amount up to 0.01% weight/weight.
21. The mixture of claim 17 , comprising phenols in an amount up to 500 ppm.
22. The mixture of claim 17 , wherein the ratio of the xylose to total dissolved sugars is <0.30 weight/weight.
23. The mixture of claim 17 , wherein the ratio of the xylose to total dissolved sugars is <0.10 weight/weight.
24. The mixture of claim 1 , further comprising hexanol in an amount up to 0.1% weight/weight.
25. The mixture of claim 8 , comprising hexanol in an amount up to 0.1% weight/weight.
26. The mixture of claim 17 , comprising hexanol in an amount up to 0.1% weight/weight.
27. The mixture of claim 1 , further comprising arabinose in a ratio to total dissolved sugars <0.10 weight/weight.
28. The mixture of claim 1 , further comprising glucose and fructose in a ratio to total dissolved sugars <0.25 weight/weight.
29. The mixture of claim 1 , comprising galactose in a ratio to total dissolved sugars <0.05 weight/weight.
30. The mixture of claim 1 , comprising mannose in a ratio to total dissolved sugars <0.05 weight/weight.
31. The mixture of claim 3 , comprising:
oligosaccharides in a ratio to total dissolved sugars <0.10 weight/weight;
arabinose in a ratio to total dissolved sugars <0.10 weight/weight;
galactose in a ratio to total dissolved sugars <0.05 weight/weight;
glucose and fructose in a ratio to total dissolved sugars <0.25 weight/weight;
mannose in a ratio to total dissolved sugars <0.05 weight/weight;
furfurals in an amount up to 0.01% weight/weight; and
phenols in an amount up to 500 ppm.
32. The mixture of claim 31 , further comprising hexanol in an amount up to 0.1% weight/weight.
33. The mixture of claim 31 , wherein the mixture has not been purified by crystallization.
34. The mixture of claim 8 , comprising:
furfurals in an amount up to 0.01% weight/weight;
phenols in an amount up to 500 ppm; and
hexanol in an amount up to 0.1% weight/weight.
35. The mixture of claim 17 , further comprising arabinose in a ratio to total dissolved sugars >0.02 weight/weight.
36. The mixture of claim 17 , further comprising galactose in a ratio to total dissolved sugars >0.02 weight/weight.
37. The mixture of claim 17 , comprising:
arabinose in a ratio to total dissolved sugars >0.02 weight/weight;
galactose in a ratio to total dissolved sugars >0.02 weight/weight;
fructose in a ratio to total dissolved sugars <0.10 weight/weight;
furfurals in an amount up to 0.01% weight/weight; and
phenols in an amount up to 500 ppm.
38. The mixture of claim 37 , further comprising hexanol in an amount up to 0.1% weight/weight.
39. The mixture of claim 1 , further comprising 2-ethylhexanol.
40. The mixture of claim 8 , further comprising 2-ethylhexanol.
41. The mixture of claim 17 , further comprising 2-ethylhexanol.