Amine salts of lignosulfonates

Details Amine salts of lignosulfonates Amine salts of lignosulfonates

1988-01-22

1989-01-10

Nielsen, Earl

Compositions: coating or plastic

Coating or plastic compositions

Metal-depositing composition or substrate-sensitizing...

1061231, C09D 1102

Patent

active

047971576

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 block 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.

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