Methods and systems for processing sugar mixtures and resultant compositions
View Patent ↗A method including: (a) selectively reacting a first sugar in a mixture which includes at least one second sugar to form a product mixture comprising a product of said first sugar; (b) separating said product of said first sugar from said product mixture; and (c) separating at least one of said at least one second sugar from said product mixture.
1. A lignocellulosic hydrolysate comprising:
(a) at least 60% xylose by weight relative to total sugar concentration;
(b) a total concentration of 0.00001% to 0.5% by weight relative to total sugar concentration of at least two marker molecules, wherein said marker molecules are selected from furfural, hydroxy-methylfurfural, and acetic acid;
(c) 0.001% to 10% oligosaccharides by weight relative to total sugar concentration; and
(d) at least 3% mannose by weight relative to total monosaccharides.
2. The lignocellulosic hydrolysate according to claim 1 , comprising at least three marker molecules.
3. The lignocellulosic hydrolysate according to claim 1 , comprising between 0.001% and 5% glucose of total sugars on a weight basis.
4. The lignocellulosic hydrolysate according to claim 1 , comprising at least 0.001% arabinose of total sugars on a weight basis.
5. The lignocellulosic hydrolysate according to claim 1 , wherein said oligosaccharides include at least one member selected from the group consisting of maltose, isomaltose and trehalose.
6. The lignocellulosic hydrolysate according to claim 1 , wherein said oligosaccharides include at least one member selected from the group consisting of gentiobiose, sophorose and cellobiose.
7. The lignocellulosic hydrolysate according to claim 1 , comprising at least one sugar selected from the group consisting of galactose and arabinose.
8. The lignocellulosic hydrolysate according to claim 1 , comprising at least 5% galactose relative to total monosaccharides by weight.
9. The lignocellulosic hydrolysate according to claim 1 , comprising at least 2% arabinose relative to total monosaccharides by weight.
10. The lignocellulosic hydrolysate according to claim 1 , 3 , or 9 , wherein said marker molecules comprise furfural and hydroxy-methylfurfural.
11. The lignocellulosic hydrolysate according to claim 1 , 3 , 8 , or 9 , further comprising at least 100 PPB 2-ethylhexanol.
12. The lignocellulosic hydrolysate according to claim 1 , comprising less than 90% of said xylose by weight relative to total sugar concentration.
13. The lignocellulosic hydrolysate according to claim 1 , wherein said lignocellulosic hydrolysate is provided as an aqueous solution.
14. The lignocellulosic hydrolysate according to claim 13 , wherein said lignocellulosic hydrolysate comprises at least 40% total sugars by weight.
15. The lignocellulosic hydrolysate according to claim 1 , wherein said lignocellulosic hydrolysate has not been purified by crystallization.
16. The lignocellulosic hydrolysate according to claim 1 , comprising at least 0.01% of said oligosaccharides by weight relative to total sugar concentration.
17. The lignocellulosic hydrolysate according to claim 1 , comprising at least 0.1% of said oligosaccharides by weight relative to total sugar concentration.
18. The lignocellulosic hydrolysate according to claim 1 or 3 , further comprising at least 100 PPB hexanol.
19. The lignocellulosic hydrolysate according to claim 1 , wherein said marker molecules comprise acetic acid.
20. The lignocellulosic hydrolysate according to claim 1 , further comprising levulinic acid or methanol.
21. A lignocellulosic hydrolysate comprising:
(a) at least 60% xylose by weight relative to total sugar concentration;
(b) a total concentration of 0.00001% to 0.5% by weight relative to total sugar concentration of at least three marker molecules, wherein said marker molecules are furfural, hydroxy-methylfurfural, and acetic acid;
(c) 0.001% to 10% oligosaccharides by weight relative to total sugar concentration;
(d) at least 2% arabinose by weight relative to total monosaccharides;
(e) at least 3% mannose by weight relative to total monosaccharides; and
(f) at least 100 PPB 2-ethylhexanol.
22. A lignocellulosic hydrolysate comprising:
(a) at least 60% xylose by weight relative to total sugar concentration;
(b) a total concentration of 0.00001% to 0.5% by weight relative to total sugar concentration of at least two marker molecules, wherein said marker molecules are selected from furfural, hydroxy-methylfurfural, and acetic acid;
(c) 0.001% to 10% oligosaccharides by weight relative to total sugar concentration; and
(d) at least 5% galactose by weight relative to total monosaccharides.