Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10389868 | Separation and Purification Technology | 2005 | 8 Pages |
Abstract
The acid dye intermediates 1-diazo-2-naphthol-4-sulfonic acid wastewater treatment by using solvent (trialkylamine N235) extraction, and the raffinate treatment by hydrogen peroxide catalytic oxidation were studied. The extraction and stripping conditions were tested and the optimum process parameters were obtained. In addition, the multistage countercurrent extraction and stripping experiments were carried out. The results showed that the single stage extraction rate was higher than 82%, decoloration rate was 95%; the single stage stripping rate was higher than 91%; the two stages countercurrent extraction rate reached 93%, the five stages countercurrent stripping rate reached almost 100%. After hydrogen peroxide catalytic oxidation, the solution was achromatic, and the COD of the effluent was below 100Â mg/l (the first-order national discharge standard).
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Filtration and Separation
Authors
HuSheng Hu, MingDe Yang, Jie Dang,