Process for the production of water-insoluble azo dyestuffs on t

Details Process for the production of water-insoluble azo dyestuffs on t Process for the production of water-insoluble azo dyestuffs on t

1976-08-03

1978-04-04

Clingman, A. Lionel

Bleaching and dyeing; fluid treatment and chemical modification

Treatment of hides, skins, feathers and animal tissues

Tanning

8 46, 8 51, 8 542, 8 82, C09B 2700

Patent

active

040825035

ABSTRACT:
It had been found that boric acid can advantageously be used as a buffer and neutralization agent in the developing bath containing the azonium compound in a process for the preparation of water-insoluble azo dyestuffs on the fiber according to the ice-color technique, thus avoiding ecological problems with regard to the waste water obtained in the dyeing process.

REFERENCES:
patent: 2178744 (1939-11-01), Ellis et al.
patent: 3288552 (1966-11-01), Streck
patent: 3697216 (1972-10-01), Hertel et al.
L. Diserens, "The Chemical Technology of Dyeing and Printing" (Reinhold, New York, 1948) p. 255.

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