Sulfation of lignin

Details Sulfation of lignin Sulfation of lignin

1990-02-22

1991-05-07

Nielsen, Earl

Chemistry: natural resins or derivatives; peptides or proteins;

Lignins or derivatives

530501, C08H 502

Patent

active

050138251

ABSTRACT:
A method of producing a sulfated lignin comprising the steps of dissolving lignin in an aqueous alkaline solution, adding an organic amine-sulfur trioxide complex to the dissolved lignin, and reacting the amine-sulfur trioxide complex with the lignin under conditions to sulfate the same.

REFERENCES:
patent: 2379889 (1945-07-01), Dorland et al.
patent: 2688611 (1954-09-01), Jones
patent: 4597770 (1986-07-01), Forand et al.
patent: 4739040 (1988-04-01), Naae et al.

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