Oxidation of vat and sulfur dyes with vanadate activated bromate

Details Oxidation of vat and sulfur dyes with vanadate activated bromate Oxidation of vat and sulfur dyes with vanadate activated bromate

1974-05-10

1976-03-16

Levy, Donald

Bleaching and dyeing; fluid treatment and chemical modification

Treatment of hides, skins, feathers and animal tissues

Tanning

8 37, 8 542, 8 76, 8 82, C09B 900, D06P 130

Patent

active

039443825

ABSTRACT:
An improved process for oxidizing vat or sulfur dyes is provided wherein the reduced form of the dye is oxidized by contact with an aqueous oxidizing solution comprising an alkali metal or ammonium vanadate and an oxidant comprising an alkali metal or ammonium bromate or iodate.

REFERENCES:
patent: 2382188 (1945-08-01), Vincent et al.
patent: 3775047 (1973-11-01), Weston
Knecht and Fothergill, "Principles and Practice of Textile Printing" (1952) pp. 589-590.
Knecht and Rawson, "A Manuel of Dyeing" (1945), Vol. I, p. 295; Vol. II p. 653.
Mullin, "Acetate Silk and its Dyes" (1927) p. 227.

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