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US 11,965,220 B2Granted
Methods for treating lignocellulosic materials
AssigneeVirdia, Inc.
InventorsRobert Jansen, Philip Travisano, Lee Madsen, Neta Matis, James Alan Lawson, Noa Lapidot, Aharon Eyal, Timothy Allen Bauer, Ziv-Vladimir Belman, Bassem Hallac, Michael Zviely
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Abstract
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.
Claims31
A method of separating xylose from a biomass-derived sugar stream, the method comprising:
- removing an acid from the biomass-derived sugar stream to form an acid-depleted sugar stream comprising less than 0.5% acid by weight;
- fractionating the acid-depleted sugar stream using a chromatographic separation system comprising a weak base anion (WBA) exchange resin;
- and
- collecting a fraction containing xylose in a ratio to total dissolved sugars (DS)>0.40 weight/weight.
1 more element
A method of separating xylose from a biomass-derived sugar stream, the method comprising:
- contacting the biomass-derived sugar stream with an amine extractant to form a mixture;
- separating from the mixture a first stream comprising the amine extractant and an acid or an impurity and a second stream comprising one or more sugars;
- fractionating the second stream using a chromatographic separation system comprising a weak base anion (WBA) exchange resin;
- and
- collecting a fraction containing xylose in a ratio to total dissolved sugars (DS)>0.40 weight/weight.
2 more elements
Dependencies are inferred from the claim text.