Amine salts of sulfomethylated lignin

Details Amine salts of sulfomethylated lignin Amine salts of sulfomethylated lignin

1985-10-03

1988-03-22

Nielsen, Earl

Bleaching and dyeing; fluid treatment and chemical modification

Organic additive for dye composition, dye composition...

Polymeric additive

8602, 530501, 530505, 1061231, C08H 502, C09B 6718

Patent

active

047325720

ABSTRACT:
Disclosed is a method for the production of a sulfomethylated lignin amine salt from the lignin by-product of the black liquor residue of a kraft pulping process and the use of lignin amine salts as additives in other chemical compositions. The lignin amine salt is produced by precipitating lignin from the black liquor and reacting the precipitated lignin slurry with formaldehyde. Thereafter, the lignin slurry is acidified to a pH of about 2 to 3 and water-washed to remove inorganic salts and other impurities therefrom. The washed methylolated lignin is reacted with an organic amine and a sulfur-oxygen-containing compound, such as sulfur dioxide to form the sulfomethylated lignin amine salt.
The sulfomethylated lignin amine salt products are disclosed as an additive in dyestuff and printing ink compositions, as well as a sequestrant in pesticide compositions, with improved results over certain lignin salts heretofore employed as additives in such compositions.

REFERENCES:
patent: 3407188 (1968-10-01), Carvagna
patent: 3505243 (1970-04-01), Steinberg et al.
patent: 4444562 (1984-04-01), Lin
patent: 4590262 (1986-05-01), Dilling
patent: 4629469 (1986-12-01), Dilling
patent: 4636224 (1987-01-01), Dilling
patent: 4642336 (1987-02-01), Dilling
patent: 4670482 (1987-06-01), Dilling

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