Chemistry: electrical and wave energy – Processes and products – Electrostatic field or electrical discharge
Patent
1984-10-29
1985-12-31
Andrews, R. L.
Chemistry: electrical and wave energy
Processes and products
Electrostatic field or electrical discharge
204248, C25B 102
Patent
active
045619484
ABSTRACT:
A process for electrochemical neutralization of acid electrolyte, such as acid mine drainage. A vessel is provided with an anode electrically connected to a cathode with the cathode material being of lesser electroactivity than that of the anode. An acid-containing electrolyte is introduced into the vessel. A voltage gradient is established between the anode and cathode by causing the electrolyte to interact chemically with the anode to effect an oxidation reaction. The cell is caused to convert hydrogen ions into elemental hydrogen and the electrolyte is withdrawn at a pH higher than the pH it had when it entered the vessel. In a preferred embodiment iron is employed in the anode to serve as a sacrificial anode with respect to pyrite which is used in the cathode. A plurality of anodes and cathodes may be provided with electrically nonconductive inert material interposed between adjacent anode and cathode elements or between adjacent anode and cathode pairs. The voltage generated by the cell preferably exceeds the over-potential for the formation of hydrogen within the vessel. Hydrogen may be generated at both the cathode and the anode.
REFERENCES:
patent: 3984295 (1976-10-01), Kametani et al.
patent: 3994789 (1976-11-01), Langer et al.
Andrews R. L.
Silverman Arnold B.
West Virginia University
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