Anode useful for electrochemical conversion of anhydrous...

C - Chemistry – Metallurgy – 25 – B

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C25B 1/24 (2006.01) B01D 61/44 (2006.01) C25B 1/16 (2006.01) C25B 1/22 (2006.01) C25B 1/26 (2006.01) C25B 9/00 (2006.01) C25B 9/04 (2006.01) C25B 9/10 (2006.01) C25B 15/08 (2006.01) H01M 8/02 (2006.01) H01M 8/24 (2006.01)

Patent

CA 2177134

A particular anode (14) comprising an electrochemically active material selected from the group comprising the oxides of the elements tin, germanium and lead and mixtures comprising at least one of the respective oxides of such elements is useful in an electrochemical cell (10) for the direct production of essentially dry halogen gas from essentially anhydrous halogen halide, or in a process for such production of essentially dry halogen gas. This cell or process may be used to produce halogen gas such as chlorine, bromine, fluorine and iodine from a respective anhydrous hydrogen halide, such as hydrogen chloride, hydrogen bromide hydrogen fluoride and hydrogen iodide.

L'invention concerne une anode spéciale (14) comprenant un matériau actif sur le plan électrochimique, choisi dans le groupe constitué d'oxydes des éléments étain, germanium et plomb, ainsi que les mélanges contenant au moins un des oxydes respectifs de ces éléments. Cette anode est utile dans une cellule électrochimique (10) pour produire directement un halogène gazeux sensiblement sec à partir d'un halogénure d'halogène sensiblement anhydre, ou dans un procédé de production d'un halogène gazeux sensiblement sec. Cette cellule peut être utilisée pour produire un halogène gazeux tel que le chlore, le brome, le fluor et l'iode à partir de l'halogénure d'hydrogène anhydre correspondant tel que le chlorure d'hydrogène, le bromure d'hydrogène, le fluorure d'hydrogène et l'iodure d'hydrogène.

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