Method for purifying industrial waste water by direct oxidation

Details Method for purifying industrial waste water by direct oxidation Method for purifying industrial waste water by direct oxidation

1988-02-17

1989-06-13

Niebling, John F.

Chemistry: electrical and wave energy

Processes and products

Electrostatic field or electrical discharge

204290F, 204291, 210748, C02F 146

Patent

active

048390070

ABSTRACT:
A method for purifying industrial waste water by direct oxidation of the organic pollutants in an electrochemical cell the anode of which contains, in its active part or in any intermediate layer present, neither noble metals in any form nor PbO.sub.2 nor graphite, but instead comprises in this part exclusively SnO.sub.2 which is doped with F, Cl, Sb, Mo, W, Nb, Ta or with a mixture of at least two of these elements. The anode has an oxygen overvoltage which is higher than that of a PbO.sub.2 comparison anode and reaches the value of at least 1.85 V at a current density of 0.1 mA/cm.sup.2 in 1 normal H.sub.2 SO.sub.4 under a pressure of 1 bar at a temperature of 20.degree. C. in the presence of a Pt counterelectrode.

REFERENCES:
patent: 3977959 (1976-08-01), Habermann et al.
patent: 4028215 (1977-06-01), Lewis et al.
patent: 4208450 (1980-06-01), Lewis et al.
Kuhn, "The Electrochemical Treatment of Aqueous Effluent Streams"; Electrochemistry of Cleaner Environments, New York, 1972, pp. 98 +30.
"Technological Impact of Metallic Oxides of Anodes"; Electrodes of Conductive Metallic Oxides (Part B); New York, 1981; pp. 627-659.

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