B. Pisarska, H. Jaroszek, W. Mikołajczak
Jan 20, 2017
Citations
0
Influential Citations
28
Citations
Journal
Journal of Cleaner Production
Abstract
Abstract Three different batches of waste solutions of sodium sulphate from the manufacture of cyclohexanone (COD = 32.86, 104 and 107 g O 2 /dm 3 ) were processed by electro-electrodialysis (EED) to convert the waste salt into NaOH and H 2 SO 4 solutions for re-use within a production plant. A laboratory installation equipped with Ultrex AMI 7001S and Nafion N–423 ion-exchange membranes was used. The applied current density was 7.5 A/dm 2 . It was found that the current efficiencies of the EED products were the same as those of EED processing of Na 2 SO 4 solutions that did not contain organic substances. However, processing of waste solutions proceeds under a voltage higher by 0.2–0.4 V and therefore involves higher power consumption. Moreover, some of the organic substances are transferred from waste solutions to the products.