New bipolar assembly for filter-press electrolyser

C - Chemistry – Metallurgy – 25 – B

Patent

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Details

C25B 9/00 (2006.01) C25B 1/46 (2006.01) C25B 9/20 (2006.01)

Patent

CA 2438028

A bipolar assembly for filter-press type electrolysers is described comprising a single sheet, whose two faces work respectively as anodic and cathodic wall, characterised by a design of perimetral flanges which greatly simplifies its construction enhancing its reliability. The peripheral flanges are made of a first flange obtained by folding the peripheral portion of the single sheet and of a second flange formed by a rod or a tube with quadrangular section or, alternatively, the first and second flange are pre-formed by folding of adequate strips subsequently fixed to the single sheet. The electrolyser resulting from the assemblage of a multiplicity of assemblies of the invention is particularly suited to the process of electrolysis of hydrochloric acid solutions carried out with chlorine-evolving anodes and oxygen-consuming cathodes.

L'invention concerne un ensemble bipolaire pour des électrolyseurs de type filtre-presse. Cet ensemble comprend une seule feuille, dont les feux faces servent respectivement de parois anodique et cathodique. Cet ensemble se caractérise par une conception de brides périmétriques qui simplifie fortement sa construction et améliore sa fiabilité. Ces brides périphériques se composent d'une première bride obtenue en pliant la partie périphérique de la feuille unique et une deuxième bride formée par une tige ou un tube avec une section quadrangulaire ou encore, les première et deuxième brides peuvent être préformées en pliant des bandes adéquates fixées ensuite à la feuille unique. L'électrolyseur obtenu par l'assemblage de plusieurs ensembles selon l'invention est particulièrement approprié pour l'électrolyse de solutions d'acide chlorhydrique effectuée avec des anodes émettant du chlore et des cathodes consommant de l'oxygène.

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