C - Chemistry – Metallurgy – 08 – J
Patent
C - Chemistry, Metallurgy
08
J
204/191, 117/88.
C08J 5/20 (2006.01) C08J 5/22 (2006.01) C25B 9/10 (2006.01)
Patent
CA 1208166
TITLE Composite Membrane/Electrode, Electrochemical Cell and Electrolysis Process ABSTRACT OF THE DISCLOSURE A composite membrane/electrode, a process for making same, an electrochemical cell and a process for electrolysis of alkali metal halides, especially sodium chloride, are disclosed. The composite membrane/ electrode consists of an ion-exchange membrane which is impermeable to hydraulic flow of liquid and which comprises at least two layers of perfluorinated ion- exchange polymer each having an equivalent weight up to about 1500. Adjacent layers of the membrane are in adherent contact with each other. A first layer is of a polymer with - SO3M functional groups and a second layer is of a polymer with - COOM functional groups, M being Na or K. An electrocatalyst is bonded to at least one exposed surface of the membrane with a fluorocarbon binder. A chloralkali cell and process with such a composite membrane/electrode operate at low voltage, high current efficiency and low power consumption.
401945
Copeland Terry M.
Johnson Bruce B.
Li Stephen
E. I. Du Pont de Nemours And Company
Mccallum Brooks & Co.
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