Chloride oxidation of dyes in vat and sulfur dyed textiles

Details Chloride oxidation of dyes in vat and sulfur dyed textiles Chloride oxidation of dyes in vat and sulfur dyed textiles

1979-01-03

1983-02-01

Higel, Floyd D.

Bleaching and dyeing; fluid treatment and chemical modification

Dye or potential dye composition, additive, treatment,...

Sulfur dye or vat dye

8651, 8652, D06P 124, D06P 130, D06P 500

Patent

active

043713734

ABSTRACT:
Oxidation of dyeings with reduced vat and sulfur dyes, is accomplished in an improved manner with sodium chlorite under acid conditions of preferably pH 4.5-6 at 30.degree.-65.degree. C. in the presence of chelating agents which prevent the release of chlorine or chlorine compounds, such chelating agents being selected from derivatives of amino carboxylic acids, such as EDTA, and hydroxyalkane phosphonic acids.

REFERENCES:
patent: 1905346 (1933-04-01), Dreyfus et al.
patent: 2382188 (1945-08-01), Vincent et al.
patent: 3369855 (1968-02-01), Hartmark et al.
Heid et al., Melliand Textilberichte, vol. 54, pp. 1314 to 1328, (1973).

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