Humectant composition derived from kraft black liquor

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

B - Operations, Transporting

01

F

260/133, 8/50

B01F 17/00 (2006.01) C09B 67/46 (2006.01) C07G 1/00 (2006.01) C08H 6/00 (2010.01)

Patent

CA 1265513

ABSTRACT OF THE DISCLOSURE 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 SO2 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.

517927

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