Oxidation of vat or sulfur dyes with vanadate activated bromate

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

1975-11-24

1977-03-15

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

Patent

active

040121925

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 agent containing in combination (a) an alkali metal, alkaline earth metal or ammonium bromate or iodate and (b) an alkali metal, alkaline earth metal or ammonium vanadate, at least one of which is an alkaline earth metal salt.

REFERENCES:
patent: 2382188 (1945-08-01), Vincent et al.
patent: 3716325 (1973-02-01), Aspland
patent: 3775047 (1973-11-01), Weston

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