Biologically produced acid precipitable polymeric lignin

Patent · Sun Jan 01 00:00:00 EST 1984

OSTI ID:865212

Crawford, Don L ^[1]

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1. Moscow, ID

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.

• Research Organization: Univ. of Iowa, Iowa City, IA (United States)
• DOE Contract Number: AS07-80ER10775
• Assignee: Genetics International, Inc. (Boston, MA)
• Patent Number(s): US 4478747
• OSTI ID: 865212
• Country of Publication: United States
• Language: English

Related Subjects

biologically
produced
acid
precipitable
polymeric
lignin
water
soluble
degraded
appl
molecular
weight
12
000
daltons
comprising
percentage
total
times
phenolic
hydroxyl
carboxylic
native
modified
chemical
oxidation
reduction
increase
content
reduce
antioxidant
inhibitory
chains
improving
properties
phenolic hydroxyl
water soluble
molecular weight
carboxylic acid
total weight
chemical oxidation
precipitable polymeric
acid precipitable
/435/530/