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Title: Biologically produced acid precipitable polymeric lignin

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.

Inventors:
;
Issue Date:
Research Org.:
Univ. of Idaho, Moscow, ID (United States); Genetics International, Inc., Boston, MA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
865212
Patent Number(s):
4478747
Application Number:
06/493,024
Assignee:
Genetics International, Inc. (Boston, MA)
Patent Classifications (CPCs):
C - CHEMISTRY C08 - ORGANIC MACROMOLECULAR COMPOUNDS C08H - DERIVATIVES OF NATURAL MACROMOLECULAR COMPOUNDS
DOE Contract Number:  
AS07-80ER10775
Resource Type:
Patent
Resource Relation:
Patent File Date: 1983 May 09
Country of Publication:
United States
Language:
English
Subject:
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/

Citation Formats

Crawford, Don L., and Pometto, III, Anthony L. Biologically produced acid precipitable polymeric lignin. United States: N. p., 1984. Web.
Crawford, Don L., & Pometto, III, Anthony L. Biologically produced acid precipitable polymeric lignin. United States.
Crawford, Don L., and Pometto, III, Anthony L. Sun . "Biologically produced acid precipitable polymeric lignin". United States. https://www.osti.gov/servlets/purl/865212.
@article{osti_865212,
title = {Biologically produced acid precipitable polymeric lignin},
author = {Crawford, Don L. and Pometto, III, Anthony L.},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1984},
month = {1}
}

Works referenced in this record:

Degradation of Softwood, Hardwood, and Grass Lignocelluloses by Two Streptomyces Strains
journal, August 1981


A Simple Modification of the Wolff-Kishner Reduction
journal, December 1946


Methoxy-deficient Structural Elements in Lignin of Sweetgum Decayed by a Brown-rot Fungus.
journal, January 1970


Antioxidant properties of synthetic 5-hydroxy-1,3-benzodioxole derivatives
journal, July 1982


Microbial degradation of lignin
journal, January 1980