Removal and recovery of hydrogen halides using an electrochemica

Electrolysis: processes – compositions used therein – and methods – Electrolytic material treatment – Gas – vapor – or critical fluid

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204245, 204246, 205618, 205619, C25B 124, C25B 1304, C25B 900

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active

056184050

ABSTRACT:
A method and apparatus for removing halides from high temperature gas mixtures (150.degree.-1000.degree. 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.sup.-. 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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Yoshizawa, S., A. Takehara, Y. Ito and K. Oka; The Recovery of Chlorine from Hydrogen Chloride: Part 1: New Method Using a Molten Salt as the Electrolyte; Journal of Applied Electrochemistry 1; 245-251; (1971). No Month Available.
Yoshizawa, S., A. Takehara, Y. Ito and K. Oka; The Recovery of Chlorine from by-product Hydrogen Chloride: Part 2: Molten Metal Cathode Method; Journal of Applied Electrochemistry 1; 253-259 (1971). No Month Available.

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