Humectant composition derived from kraft black liquor

Details Humectant composition derived from kraft black liquor Humectant composition derived from kraft black liquor

1985-10-11

1986-12-16

Clingman, A. Lionel

Bleaching and dyeing; fluid treatment and chemical modification

Organic additive for dye composition, dye composition...

Polymeric additive

8526, 8528, 8589, 530501, C09B 6700

Patent

active

046294694

ABSTRACT:
Method of producing a by-product of the black liquor residue of a kraft wood pulping process having excellent product stability and exhibiting humectant properties in dyestuff compositions, and the resultant humectant product and dyestuff compositions containing such humectant product. The black liquor, after removal of tall oil fractions, is oxidized and thereafter treated with an aldehyde to methylolate the lignin components therein, the methylolated lignin-containing black liquor is treated with a sulfur-oxygen-containing compound, such as SO.sub.2 gas, under sufficient conditions to sulfomethylate and solubilize the lignin components, and the resultant composition is concentrated to a solids content of from about 50% to up to about 70% at a pH of approximately 7.5 to produce the final humectant product.

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patent: 3769272 (1973-10-01), Hintz
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patent: 4521336 (1985-06-01), Dilling
patent: 4534771 (1985-08-01), Dilling
patent: 4551151 (1985-11-01), Dilling

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