SULFITE-BASED PROCESSES FOR PRODUCING NANOCELLULOSE, AND COMPOSITIONS AND PRODUCTS PRODUCED THEREFROM

Number of patents in Portfolio can not be more than 2000

United States of America

APP PUB NO 20220034038A1
SERIAL NO

17503962

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Abstract

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Processes disclosed are capable of converting biomass into high-crystallinity nanocellulose with low mechanical energy input. In some variations, the process includes fractionating biomass with sulfur dioxide or a sulfite compound 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 total mechanical energy may be less than 500 kilowatt-hours per ton. 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.

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Patent Owner(s)

Patent OwnerAddress
GRANBIO INTELLECTUAL PROPERTY HOLDINGS LLC300 MCINTOSH PARKWAY THOMASTON BIOREFINERY THOMASTON GA 30286

International Classification(s)

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  • 2021 Application Filing Year
  • C13K Class
  • 38 Applications Filed
  • 15 Patents Issued To-Date
  • 39.48 % Issued To-Date
Click to zoom InYear of Issuance% of Matters IssuedCumulative IssuancesYearly Issuances202120222023202420250255075100

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
NELSON, Kimberly Atlanta, US 90 486
O'CONNOR, Ryan Minnetrista, US 40 360
PYLKKANEN, Vesa Atlanta, US 112 648
RETSINA, Theodora Atlanta, US 156 843

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