Solid acid catalyzed hydrolysis of cellulosic materials
First Claim
1. A solid reaction product comprising catalytic products of reaction of a solid acid and a solid cellulose-containing material, wherein a combined free water content of the solid acid and solid cellulose-containing material is from about 8% to about 40% by weight, and wherein:
- (i) at least 70 percent by weight of the solid reaction product collected immediately after the reaction between the solid acid and solid cellulose-containing material consists essentially of water soluble monosaccharides and disaccharides; and
(ii) the solid reaction product, collected immediately after the reaction between the solid acid and solid cellulose-containing material, comprises a water content of less than or equal to 10 percent by weight.
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Abstract
Provided are methods for the solubilization of cellulose into soluble sugars without the need for high temperatures, high pressures, strong acid solutions, and/or added water. The produced sugars can be fermented into ethanol. In one embodiment, the method comprises contacting a cellulose-containing material with a solid acid material and agitating the cellulose-containing material and the solid acid material for a time sufficient to produce an aqueous solution comprising a quantity of soluble sugars.
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Citations
13 Claims
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1. A solid reaction product comprising catalytic products of reaction of a solid acid and a solid cellulose-containing material, wherein a combined free water content of the solid acid and solid cellulose-containing material is from about 8% to about 40% by weight, and wherein:
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(i) at least 70 percent by weight of the solid reaction product collected immediately after the reaction between the solid acid and solid cellulose-containing material consists essentially of water soluble monosaccharides and disaccharides; and (ii) the solid reaction product, collected immediately after the reaction between the solid acid and solid cellulose-containing material, comprises a water content of less than or equal to 10 percent by weight. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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- 10. A composition comprising a solid reaction product obtained from a step of mechanocatalytically agitating a solid cellulose-containing material in the presence of a solid acid catalyst in the absence of added water, wherein a combined free water content of the solid acid catalyst and the solid cellulose-containing material is from about 8% to about 40% by weight, and wherein the solid reaction product collected immediately after the mechanocatalytic agitation (i) comprises levoglucosenone and furfural and (ii) has a water content less than or equal to 10 percent by weight, and at least 70 percent by weight of the solid reaction product consists essentially of water soluble monosaccharides and disaccharides.
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13. A solid reaction product comprising catalytic products of reaction of a solid acid and a solid cellulose-containing material, wherein a combined free water content of the solid acid and the solid cellulose-containing material is from about 8% to about 40% by weight, and wherein:
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(i) at least 70 percent by weight of the solid reaction product collected immediately after the reaction between the solid acid and solid cellulose-containing material consists essentially of glucose and xylose; and (ii) the solid reaction product collected immediately after the reaction between the solid acid and solid cellulose-containing material comprises a water content of less than or equal to 10 percent by weight.
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Specification