| 摘要 |
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.
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