Title:
Removal And Recovery Of Hydrogen Halides Using An Electrochemical Membrane

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A method and apparatus for removing halides from high temperature gas mixtures (150°-1000°C.) using an electrochemical cell provided with inert electrodes and an electrolyte which will provide anions compatible with the halide anions formed at the anode. The electrolyte is elected to provide inert stable cations at the temperatures encountered. The gas mixture is passed by the cathode where the halides are converted to X-. The anions migrate to the anode where they are converted to a stable gaseous form at much greater concentration levels. Current flow may be effected by utilizing an external source of electrical energy or by passing a reducing gas such as hydrogen past the anode.
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4/8/1997
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