Heat-treated fluorocarbon sulfonamide cation exchange membrane a

Details Heat-treated fluorocarbon sulfonamide cation exchange membrane a Heat-treated fluorocarbon sulfonamide cation exchange membrane a

1978-09-27

1979-09-18

Andrews, R. L.

Chemistry: electrical and wave energy

Processes and products

204128, 204296, C25B 120, C25B 126, C25B 1308

Patent

active

041682165

ABSTRACT:
An ion exchange membrane of a fluorinated polymer which contains sulfonyl groups, wherein the sulfonyl groups on one surface of the membrane are in the form of N-monosubstituted sulfonamide groups formed from a di- or polyamine, is treated by heating at a temperature of 100.degree. to 160.degree. C. for a time of at least 15 minutes. The resulting membrane is useful as the membrane in a chloralkali electrolysis cell, and permits operation of such cells at high current efficiency over extended periods of time.

REFERENCES:
patent: 4026783 (1977-05-01), Grot
patent: 4101395 (1978-07-01), Motani et al.

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