Conversion of knot rejects from chemical pulping
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United States of America Patent
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Oct 9, 2012
Grant Date -
Sep 23, 2010
app pub date -
Dec 16, 2008
filing date -
Dec 19, 2007
priority date (Note) -
Expired
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Abstract
Knot rejects from chemical pulping processes are subjected to acid hydrolysis or an enzymatic hydrolysis treatment. The resultant hydrolysate is enriched with glucose, representing a value-added raw material for products using hexoses. The residue, separated from the said hydrolysate after the acid hydrolysis or enzyme treatment, consists of mainly knots or chips. The residue has a much improved aesthetic appearance which can be readily used as value-added raw materials for mulch or similar applications. The residue could also be extracted to obtain high value antioxidants and other nutraceutical chemicals such as lignans or can be utilized according to currently known practices including recooking, burning and depositing.
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