Electrochemical conversion of anhydrous hydrogen halide to...

C - Chemistry – Metallurgy – 25 – B

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C25B 1/24 (2006.01) C25B 1/26 (2006.01) C25B 9/00 (2006.01) C25B 9/04 (2006.01) C25B 9/10 (2006.01) H01M 8/24 (2006.01)

Patent

CA 2177133

The invention relates to a process for electrochemically converting anhydrous hydrogen halide. such as hydrogen chloride, hydrogen fluoride, hydrogen bromide and hydrogen iodide to essentially dry halogen gas, such as chlorine, fluorine, bromine and iodine gas, respectively. This process allows the production of high-purity halogen gas. In this process, molecules of essentially anhydrous hydrogen halide are fed through an inlet (18) of an electrochemical cell and are transported to the anode (14) of the cell. The molecules of the essentially anhydrous hydrogen halide are oxidized at the anode of the cell to produce essentially dry halogen gas and protons which are transported through the membrane (12) of the cell. The transported protons are reduced at the cathode (16).

L'invention concerne un procédé pour convertir par voie électrochimique un halogénure d'hydrogène anhydre tel que le chlorure d'hydrogène, le fluorure d'hydrogène, le bromure d'hydrogène et l'iodure d'hydrogène, en un halogène gazeux tel que le chlore, le fluor, le brome et l'iode respectivement, sensiblement sec. Ce procédé permet de produire un halogène gazeux de haute pureté. Dans ce procédé, les molécules de l'halogènure d'hydrogène sensiblement anhydre sont amenées par une entrée (18) d'une cellule électrochimique, et elles sont transportées vers l'anode (14) de la cellule. Les molécules de l'halogénure d'hydrogène sensiblement anhydre sont oxydées à l'anode de la cellule pour produire un halogène gazeux sensiblement sec et des protons, lesquels sont transportés à travers la membrane (12) de la cellule. Les protons transportés sont réduits à la cathode (16).

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