Collect. Czech. Chem. Commun. 1995, 60, 482-488

Purification of Phenolic Waste Waters by Catalytic Oxidation

Vratislav Tukač and Jiří Hanika

Department of Organic Technology, Prague Institute of Chemical Technology, 166 28 Prague 6, Czech Republic


Catalytic oxidation of phenolic substances in industrial waste waters is alternative for pollutants biodegradable with difficulty or toxic for activated sludge. The oxidation of an aqueous phenol solution by oxygen was carried out in the presence of industrial catalyst Cherox 46-11 (30% Cu, Chemopetrol Litvinov) in a stainless steel autoclave at 120 - 160 °C. Compared to the radical reaction, the rate of the catalytic oxidation was two times higher. The reaction order with respect to phenol was close to one. The presence of acids in high concentrations at low oxygen partial pressures speaks for the higher reaction order to oxygen.