Abstract: Dye would be accompanied by the production process of preparation of certain components of salt. Desalination is the production of high-quality dye crucial step. A lot of practical experience has proven that high salt content will directly reduce the purity of dyes, thereby reduce the dissolution performance of dye in the dyeing process, impact colored of dyes, but will also affect the fastness of dye. The desalination from dye is using salting-out in domestic traditional process. Now there are more with the Nanofiltratio. This paper introduces the application of desalination dyes with the electrodialysis. In experimental of dye desalination, the effects of dye desalination such as the dye concentration, the different salt concentration in dye, current were studied. The results showed that: in the experimental dye concentration solution, the salt can be removal with electrodialysis, desalination effect can be as high as more than 95 percent, in the process of desalination the loss rate of dyes are less than 1%.
Keywords:Dye ; Electrodialysis ; Desalination