Studies on the Extraction of Phenol from the Wastewater of Multi-generation System

Recovery of phenol from the wastewater produced in the multi-cogeneration system has been studied. Based on the experimental results and theoretical analysis, butyl acetate was selected as the extractant and 99.95% of the volatile phenols in the wastewater was recovered in five stage extraction. The solvent recovery in the distillation column and the stripping column were also considered. Moreover, Aspen Plus was used for the simulation of the phenols extraction in the extraction column. Final result shows that phenol is much more difficult to be recovered because of its lower distribution coefficiency among the volatile phenols. The least solvent flow can also be found at different theoretical stages for the special environmental restrictions.