Processes and apparatus for producing nanocellulose, and compositions and products produced therefrom
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
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Feb 2, 2021
Grant Date -
Apr 4, 2019
app pub date -
Oct 4, 2018
filing date -
Nov 30, 2012
priority date (Note) -
In Force
status (Latency Note)
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US Family Size
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Non-US Coverage
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Abstract
Processes disclosed are capable of converting biomass into high-crystallinity nanocellulose with surprisingly low mechanical energy input. In some variations, the process includes fractionating biomass with an acid (such as sulfur dioxide), a solvent (such as ethanol), and water, to generate cellulose-rich solids and a liquid containing hemicellulose and lignin; and mechanically treating the cellulose-rich solids to form nanofibrils and/or nanocrystals. The crystallinity of the nanocellulose material may be 80% or higher, translating into good reinforcing properties for composites. The nanocellulose material may include nanofibrillated cellulose, nanocrystalline cellulose, or both. In some embodiments, the nanocellulose material is hydrophobic via deposition of some lignin onto the cellulose surface. Optionally, sugars derived from amorphous cellulose and hemicellulose may be separately fermented, such as to monomers for various polymers. These polymers may be combined with the nanocellulose to form completely renewable composites.
First Claim
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International Classification(s)
- C09K:MATERIALS FOR APPLICATIONS NOT OTHERWISE PROVIDED ....
- C08H:DERIVATIVES OF NATURAL MACROMOLECULAR COMPOUNDS
- C07G:COMPOUNDS OF UNKNOWN CONSTITUTION
- C12P:FERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESI....
- C08B:POLYSACCHARIDES; DERIVATIVES THEREOF
- C13K:GLUCOSE; INVERT SUGAR; LACTOSE; MALTOSE; SYNTHESIS....
- D21H:PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED....
- C08L:COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- D21C:PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE ....
- 2018 Application Filing Year
- C09K Class
- 2902 Applications Filed
- 1876 Patents Issued To-Date
- 64.65 % Issued To-Date
Cited Art Landscape
Patent Citation Ranking
- 0 Citation Count
- C09K Class
- 0 % this patent is cited more than
- 4 Age
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|---|---|---|---|
| 7.5 Year Payment | $3600.00 | $1800.00 | $900.00 | Aug 2, 2028 |
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Aug 2, 2032 |
