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US 2015/0307952 A1Published application
Liquid co-extraction process for production of sucrose, xylo-oligosaccharides and xylose from feedstock
OwnerBradley A. Savilleinventor
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Abstract
The present invention provides methods for extraction of sucrose, xylo-oligosaccharides, xylose and bioactive compounds from feedstock, and in particular to the hot-water co-extraction of sucrose, fructose, glucose, xylo-oligosaccharides, or xylose and bioactive compounds from feedstock.
Claims50
A method of extracting mixed sugars from a lignocellulosic feedstock, comprising:
- a. adding water to the feedstock in a cook vessel to produce a feedstock solids and water mixture;
- b. heating the mixture in the cook vessel under pressure to an extraction temperature of approximately 130° C. to 180° C. and retaining the extraction temperature and pressure for a retention time of from approximately 30 minutes to approximately 8 hours, wherein, the volume of water combined with the feedstock in the cook vessel is predetermined to keep the water primarily in a liquid state during the retention time, whereby, contents of the vessel comprise a liquid fraction and a solids fraction;
- and
- c. separating the liquid fraction from the solids fraction remaining in the cook vessel to produce a liquid stream and a solids stream,
- whereby, the liquid stream comprises a mixture of solubilized fructose, glucose, xylo-oligosaccharides and xylose and the solids stream comprises cellulose and lignin.
2 more elements
A method of extracting mixed sugars from a lignocellulosic feedstock, comprising:
- a. physically processing the feedstock to reduce the particle size and increase the surface area of the feedstock;
- b. separating the processed feedstock from any liquid that formed during physical processing to produce feedstock solids;
- c. combining the processed feedstock with a volume of water in a cook vessel to produce a processed feedstock solids and water mixture;
- d. heating the mixture in the cook vessel under pressure to an extraction temperature of approximately 130° C. to 180° C. and retaining the extraction temperature and pressure for a retention time of from approximately 30 minutes to approximately 8 hours, wherein, the volume of water combined with the processed feedstock solids in the cook vessel is predetermined to keep the water primarily in a liquid state during the retention time, whereafter, contents of the vessel comprise a liquid fraction and solids fraction;
- and
- e. separating the liquid fraction from the solids fraction remaining in the vessel to produce a liquid stream and a solids stream,
- whereby, the liquid stream comprises a mixture of solubilized fructose, glucose, xylo-oligosaccharides and xylose, and the solids stream comprises cellulose and lignin.
4 more elements
A method of extracting mixed sugars from a lignocellulosic feedstock, comprising:
- a. physically processing the feedstock to reduce the particle size and increase the surface area of the feedstock;
- b. adding water to the feedstock in a cook vessel to create a slurry mixture;
- c. heating the slurry mixture under pressure to an extraction temperature of approximately 120° C. to 150° C. and retaining the extraction temperature and pressure for approximately 40 minutes, wherein, the volume of water added to the feedstock in the cook vessel is predetermined to keep the water primarily in a liquid state during the retention time, and whereafter, contents of the vessel comprise a liquid portion and solids portion;
- d. draining and holding the liquid portion from the cook vessel and retaining the solids portion in the vessel;
- e. adding water to the cook vessel;
- f. heating and maintaining the temperature and pressure in the cook vessel at approximately 160° C. to 180° for approximately 60 minutes, whereafter, contents of the vessel comprise a second liquid fraction and a solids fraction;
- and
- g. separating the second liquid fraction from the solids fraction remaining in the cook vessel and combining the second liquid fraction with the first liquid portion to produce a liquid stream and a solids stream,
- whereby, the liquid stream comprises a mixture of solubilized sucrose, fructose, glucose, xylo-oligosaccharides and xylose.
6 more elements
Dependencies are inferred from the claim text.