Treatment of dye wastes

Details Treatment of dye wastes Treatment of dye wastes

1975-03-28

1977-08-30

Kight, III, John

Bleaching and dyeing; fluid treatment and chemical modification

Treatment of hides, skins, feathers and animal tissues

Tanning

8 81, 210 28, 210 40, 210 42R, 210 59, 210 60, 210 62, D06P 510

Patent

active

040451712

ABSTRACT:
A process is disclosed for the removal of colorants from industrial dye waste solutions which involves the treatment of the waste with a solution of a Group IA or IIA metal halide or sulfate to precipitate the colorant, which subsequently is removed by common solid separation techniques as a dense material of relatively high solids content. The process is particularly suitable for integration into a dyeing process to increase color fastness of the dyed article.

REFERENCES:
patent: 3502577 (1970-03-01), Hutchins et al.
patent: 3829380 (1974-08-01), Oohara
patent: 3944383 (1976-03-01), Davis
patent: 3947248 (1976-03-01), Powers

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