Nitrite-oxidized lignosulfonates and method of making the same a

Details Nitrite-oxidized lignosulfonates and method of making the same a Nitrite-oxidized lignosulfonates and method of making the same a

1991-05-23

1992-12-08

Kight, III, John

Chemistry: natural resins or derivatives; peptides or proteins;

Lignins or derivatives

530501, C08H 502

Patent

active

051699311

ABSTRACT:
A nitrite-oxidized base lignosulfonate and a method of making the same; the method comprises providing a base lignosulfonate material and oxidizing it in the presence of sodium nitrite under alkaline conditions at a temperature greater than about 100.degree. C.; useful products of same are dispersants for dyes and dispersants for setting materials e.g. gypsum.

REFERENCES:
patent: 1731433 (1929-10-01), Onnertz et al.
patent: 1829852 (1931-11-01), Darling
patent: 4488907 (1984-12-01), Sarkkinen
L. Primacheva, T. Adrianova, and V. Kirillova, Khim. Drev. (Riga), 1, 100 (1989). [Russ.].
L. Primacheva, T. Bugaeva, E. Gracheva, and N. Gladkova Gridroliz. Lesokhim. Prom., 2, 15 (1986). [Russ.].
L. Primacheva, E. Gracheva, T. Bugazeva, and F. Pokhorukov, ibid., 3, 16 (1987). [Russ.].
L. Primacheva, E. Gracheva, N. Gladkova, T. Bugaeva, and F. Pokhorukov, ibid., 7, 19 (1987). [Russ.].
L. Primacheva, T. Bugaeva, and V. Skachkov, ibid., 5, 11 (1988). [Russ.].

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