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US 2017/0349958 A1Published application
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.
Claims21
-329. (canceled)
A method of producing high purity lignin from a biomass, comprising:
- (i) removing an acidic hemicellulose sugar stream from the biomass, thereby obtaining a lignin-containing remainder;
- wherein the lignin-containing remainder comprises lignin and cellulose;
- (ii) contacting the lignin-containing remainder with a lignin extraction solution to produce a lignin extract and a cellulosic remainder;
- wherein the lignin extraction solution comprises a limited-solubility solvent, an organic acid, and water;
- and
- (iii) separating the lignin extract from the cellulosic remainder;
- wherein the lignin extract comprises lignin dissolved in the lignin extraction solution, and wherein the limited-solubility solvent and the water form an organic phase and an aqueous phase.
4 more elements
A method of producing high purity lignin from a biomass, comprising:
- (i) removing an acidic hemicellulose sugar stream from the biomass, thereby obtaining a lignin-containing remainder;
- wherein the lignin-containing remainder comprises lignin and cellulose;
- (ii) contacting the lignin-containing remainder with a lignin extraction solution to produce a lignin extract and a cellulosic remainder;
- wherein the lignin extraction solution comprises a limited-solubility solvent, an organic acid, and water;
- (iii) separating the lignin extract from the cellulosic remainder;
- wherein the lignin extract comprises lignin dissolved in the lignin extraction solution, and wherein the limited-solubility solvent and the water form an organic phase and an aqueous phase;
- and
- (iv) adjusting pH of the lignin extract to 3.0-4.5.
5 more elements
Dependencies are inferred from the claim text.