US 7,803,259 B2Granted

Electrochemical cell

AssigneeBayer MaterialScience AG

InventorsFritz Gestermann, Hans-Dieter Pinter, Rainer Weber, Gerd Speer, Andreas Bulan

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Abstract

The invention describes an electrochemical cell for the electrolysis of an aqueous solution of hydrogen chloride, comprising at least an anode half-cell with an anode, a cathode half-cell with a gas diffusion electrode as cathode and an ion exchange membrane arranged between the anode half-cell and the cathode half-cell, the membrane consisting of at least a perfluorosulfonic acid polymer, wherein the gas diffusion electrode and the ion exchange membrane are adjacent to each other, characterised in that the gas diffusion electrode and the ion exchange membrane, under a pressure of 250 g/cm2 and at a temperature of 60° C., have a contact area of at least 50%, with respect to the geometric area.

Claims13

Dependent claims

An electrochemical cell for electrolysis of an aqueous solution of hydrogen chloride comprising:

a) an anode half-cell comprising an anode,
b) a cathode half-cell comprising a gas diffusion electrode as the cathode, and
c) an ion exchange membrane comprising a perfluorosulfonic acid polymer which is positioned between a) and b)
wherein the gas diffusion electrode has a surface having a geometric area, and wherein the ion exchange membrane has a surface having a geometric area, the surface of the ion exchange membrane comprising a layer of the perfluorosulfonic acid polymer with a support member embedded therein, and wherein the surface of the gas diffusion electrode and the surface of the ion exchange membrane are adjacent to each other and, at a pressure of 250 g/cm2 and a temperature of 60° C., the gas diffusion electrode and the ion exchange membrane have a contact area of at least 50% of their geometric area.

1 more element

Dependencies are inferred from the claim text.