Sugar – starch – and carbohydrates – Processes – Carbohydrate manufacture and refining
Reexamination Certificate
2011-08-09
2011-08-09
Marx, Irene (Department: 1651)
Sugar, starch, and carbohydrates
Processes
Carbohydrate manufacture and refining
C435S161000, C435S163000, C435S165000, C127S044000
Reexamination Certificate
active
07993463
ABSTRACT:
The present invention provides a method of producing xylose from lignocellulosic feedstock. The method comprises disrupting lignocellulosic feedstock; leaching the lignocellulosic feedstock by contacting the feedstock with at least one aqueous solution for a period greater than about 2 minutes to produce a leached feedstock and a leachate; removing the leachate from the leached feedstock; acidifying the leached feedstock to a pH between about 0.5 and about 3 to produce an acidified feedstock, and; reacting the acidified feedstock under conditions which disrupt fiber structure and hydrolyze a portion of hemicellulose and cellulose of the acidified feedstock, to produce a composition comprising xylose and a pretreated feedstock. The xylose may be purified from the pretreated feedstock or it may be converted to ethanol with the pretreated feedstock.
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Anand Vijay
Griffin Robert
Mott Corinne
Nicholson Colin
Tolan Jeffrey S.
Fitzpatrick ,Cella, Harper & Scinto
Iogen Energy Corporation
Marx Irene
Underdahl Thane
LandOfFree
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