Recovery of spent deicing fluid
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United States of America Patent
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-
Sep 3, 1996
Grant Date -
N/A
app pub date -
Dec 15, 1993
filing date -
Dec 15, 1993
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Recovery of ethylene glycol from dilute aqueous solutions is accomplished by passing the solution over the surface of a porous hydrophobic membrane capable of passing water vapor but not liquid water. The pressure and temperature provide a positive driving force for the movement of water vapor through the membrane to the opposite face where it is removed by condensation or a stream of gas or liquid. Preliminary concentration of the aqueous solutions may be provided by use of reverse osmosis membrane. The method is useful in the reclamation of spent deicing fluid.
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