直接黄11染料电渗析脱盐

采用电渗析法对直接黄11染料进行脱盐纯化,考察了电流密度、染料液室流量、染料质量浓度、盐的质量分数及pH值等对直接黄11染料电渗析脱盐过程的脱盐率与染料损失率的影响。实验表明,电渗析可有效脱除染料中的无机盐,在实验的电流密度1.5~5.0 mA/cm2、染料室流量0.12~0.21 L/min、染料质量浓度4~16 g/L、盐的质量分数5%~20%及pH3.8~12范围内,直接黄11染料液的脱盐率均达到99%以上,染料损失率小于2%。

Desalination of direct yellow 11 dye with electrodialysis

The electrodialysis desalination of direct yellow 11 dye was investigated.The effects of current density,dye solution room flow rate,dye concentration,salt contents of the solution and pH on desalination rate and dye loss rate of the electrodialysis desalination process of direct yellow 11 dye were also studied.The experiment results showed that the inorganic salts existing in direct yellow 11 dye solution can be removed effectively.Under operating condition,current density 1.5-5.0 mA/cm2,dye solution room flow rate 0.12-0.21 L/min,dye concentration 4-16 g/L,salt contents 5%-20% and pH 3.8-12,the desalination efficiency is all reached more than 99% and the loss rate of dye is less than 2%.