Lignin having nitrogen and sulfur and process therefor employing

Details Lignin having nitrogen and sulfur and process therefor employing Lignin having nitrogen and sulfur and process therefor employing

1987-12-28

1989-08-15

Kight, John

Chemistry: natural resins or derivatives; peptides or proteins;

Lignins or derivatives

Compound containing nitrogen attached directly or indirectly...

530501, 530502, 530504, C08F 4548, C08F 330

Patent

active

048576387

ABSTRACT:
A product comprising lignin material having a N-content of at least 1.86% and a sulfur content of at least 3.1%, an IR in the vicinity of 1550 to 1670 cm.sup.-1 having a peak width of at least 60 cm.sup.-1. The product is also directed to such products being cross-linked and which are most suitable as chelating agents in basic medium. The product may also be used as flame retardant, for agricultural and other end uses. The invention is also directed at a method of making the above product which comprises heating a lignin containing material with thiourea H.sub.2 N--C(S)--NH.sub.2 : for example by heating in a solvent or melting.

REFERENCES:
patent: 3915911 (1975-10-01), Horiguchi
Chem. Abstracts 55:21579e, Kogyo Kagaku Zasshi 61, 1078-1079, (1958).

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