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US 9,175,443 B2Granted
Functionalizing cellulosic and lignocellulosic materials
AssigneeXyleco, Inc.
InventorMarshall Medoff
Life of this patent
Estimating the term…
Abstract
Irradiated lignocellulosic or cellulosic materials are provided which contain carboxylic acid groups and/or other functional groups not present in a naturally occurring cellulosic or lignocellulosic material from which the irradiated material was obtained.
Claims22
A method comprising:
- irradiating a lignocellulosic or cellulosic material in air with multiple doses of irradiation, to achieve a total dosage of from about 10 Mrad to about 100 Mrad of radiation, each dose being delivered at a dose rate of at least 0.5 Mrad/second using an electron beam operating in continuous wave mode, to generate carboxylic acid groups by reaction of the irradiated feedstock with the air and thereby provide an irradiated lignocellulosic or cellulosic material having a larger number of carboxylic acid groups than the cellulosic or lignocellulosic material from which the irradiated material was obtained.
Dependencies are inferred from the claim text.