Westvaco Corporation

Humbert T DelliColli

Peter Dilling

James E Davis

Thomas F McPartland

Walter A Bauer

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.

Amine salts of lignosulfonates

A method of crop seed treatment is disclosed which provides an increase in the yield of seedlings emerging from the treated seeds in soil and stimulates growth of the seedlings. The method comprises coating the seeds prior to planting with an aqueous suspension of water-insoluble alkali lignin containing minor amounts of at least one surfactant wherein the lignin has a mean particle size of from 0.5 to 5 microns in diameter.

Seed treatment method with aqueous suspension of alkali lignin

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.

A method of crop seed treatment is disclosed which provides an increase in the yield of seedlings emerging from the treated seeds in soil and stimulates growth of the seedlings. The method comprises coating the seeds prior to planting with an aqueous suspension of a water-insoluble alkali lignin containing minor amounts of at least one surfactant wherein the lignin has a mean particle size from 0.5 to 5 microns in diameter.

A method for protecting crops from injury caused by the application of herbicides and fungicides has been discovered, the method comprising applying to the crops in combination with the pesticide a phytotoxicity reducing amount of a water-insoluble, non-sulfonated alkali lignin. A water-insoluble, non-sulfonated alkali lignin based spray tank mix additive is provided which, when mixed with the pesticide prior to application, reduces the phytotoxic effect of the pesticide.

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Hanahan, SC, United States of America

Humbert T DelliColli