Biologically produced acid precipitable polymeric lignin
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United States of America Patent
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Oct 23, 1984
Issued Date -
N/A
app pub date -
May 9, 1983
filing date -
May 11, 1982
priority date (Note) -
Expired
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Abstract
A water soluble, acid precipitable polymeric degraded lignin (APPL), having a molecular weight of at least 12,000 daltons, and comprising, by percentage of total weight, at least three times the number of phenolic hydroxyl groups and carboxylic acid groups present in native lignin. The APPL may be modified by chemical oxidation and reduction to increase its phenolic hydroxyl content and reduce the number of its antioxidant inhibitory side chains, thereby improving antioxidant properties.
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