Processes and systems for producing nanocellulose from old corrugated containers

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 12018432
APP PUB NO 20210148048A1
SERIAL NO

16996414

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Abstract

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In some variations, OCC is screened, cleaned, deinked, and mechanically refined to generate cellulose nanofibrils. The OCC may be subjected to further chemical, physical, or thermal processing, prior to mechanical refining. For example, the OCC may be subjected to hot-water extraction, or fractionation with an acid catalyst, a solvent for lignin, and water. In certain embodiments to produce cellulose nanocrystals, OCC is exposed to AVAP® digestor conditions. The resulting pulp is optionally bleached and is mechanically refined to generate cellulose nanocrystals. In certain embodiments to produce cellulose nanofibrils, OCC is exposed to GreenBox+® digestor conditions. The resulting pulp is mechanically refined to generate cellulose nanofibrils. The site of a system to convert OCC to nanocellulose may be co-located with an existing OCC processing site. The nanocellulose line may be a bolt-on retrofit system to existing infrastructure. In other embodiments, a dedicated plant for converting OCC to nanocellulose is used.

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Patent Owner(s)

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

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Hill, Lee Atlanta, US 12 84
Nelson, Kimberly Atlanta, US 90 486
Retsina, Theodora Atlanta, US 156 843

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