Ionic contact media for electrodes and soil in conduction heating
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United States of America Patent
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Dec 17, 1996
Grant Date -
N/A
app pub date -
Feb 5, 1992
filing date -
Feb 5, 1992
priority date (Note) -
Expired
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Abstract
Ionic contact is established and maintained between electrodes and soil in ohmic heating of a subsurface formation for recovery of volatile and semi-volatile materials, such as hazardous waste, hydrocarbon-like materials, and valuable minerals having thermally responsive properties. A compressed, dry sponge is wrapped around an electrode, which is then inserted into a bore hole. A conductive liquid is added to the bore hole, causing the sponge to swell, creating a stable and substantial interface for the flow of heating currents.
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