Chemistry: natural resins or derivatives; peptides or proteins; – Lignins or derivatives
Patent
1989-01-19
1991-09-17
Kight, III, John
Chemistry: natural resins or derivatives; peptides or proteins;
Lignins or derivatives
530501, C08H 502
Patent
active
050496611
ABSTRACT:
A sulfonated lignin composition suitable for use as an additive in other chemical compositions and processes having improved solubility in aqueous medium at varying pH levels, and a method of producing such sulfonated water-soluble lignin products by reaction of an unsulfonated or a sulfonated starting lignin compound with sulfuric acid having a concentration of at least about 95%, while maintaining the temperature of the reaction below 40.degree. C. for a sufficient time to sulfonate the same. Sulfuric acid sulfonation increases the organically bound sulfonic acid content of the starting lignin compound at least about 1.7 moles sulfonic acid per mole of lignin, while providing water-solubility of the product at a wide range of pH levels.
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Polyfon F product bulletin from the Westvaco Corporation.
Kight III John
Krass Frederick
McDaniel Terry B.
Reece IV Daniel B.
Schmalz Richard L.
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