Electrochemical cell

US7803259B2 · kind B2 · utility

Assignee

• Bayer MaterialScience AG · DE

Inventors

• Fritz Gestermann · Leverkusen, DE
• Hans-Dieter Pinter · Wermelskirchen, DE
• Rainer Weber · Leverkusen, DE
• Gerd Speer · Burscheid, DE
• Andreas Bulan · Langenfeld, DE

Key dates

• Filing date: Jul 19, 2004
• Grant date: Sep 28, 2010
• Expiry date: Oct 29, 2024

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C25B13/00
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

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.