Chemistry: natural resins or derivatives; peptides or proteins; – Lignins or derivatives
Patent
1989-03-16
1991-08-27
Kight, III, John
Chemistry: natural resins or derivatives; peptides or proteins;
Lignins or derivatives
530501, C08H 502
Patent
active
050434349
ABSTRACT:
A sulfonated lignin composition suitable for use as an additive in other chemical compositions and processes having essentially complete water solubility in aqueous medium at all 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 oleum, while maintaining the temperature of the reaction below 40.degree. C. for a sufficient time to sulfonate the same. Oleum sulfonation provide an increases the organically bound sulfuonic acid content of the starting lignin compound of at least about 4.2 moles sulfonic acid per mole of lignin, while providing essentially complete water solubility of the product at all 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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