Chemistry: electrical and wave energy – Processes and products
Patent
1978-03-22
1980-08-26
Andrews, R. L.
Chemistry: electrical and wave energy
Processes and products
204128, 204258, 204296, C25B 116, C25B 126, C25B 900, C25B 1302
Patent
active
042193940
ABSTRACT:
In an electrolytic cell of the membrane type wherein the anolyte and catholyte are separated by a hydraulically impermeable membrane, the improvement comprising limiting the hydraulically impermeable membrane portion of the divider between anolyte and catholyte chambers to that area which is between the active areas of the anode and cathode while all other areas between catholyte and anolyte chambers are nonpermeable so as to minimize back-migration of undesirable ions which decrease overall current efficiency. Specifically, in a chlor-alkali cell an electrode would be enclosed in a fluorinated ethylene propylene enclosure having window-like openings therein made from Nafion type hydraulically impermeable cation exchange membrane, said window-like openings exposing only active electrode areas.
REFERENCES:
patent: 3072545 (1963-01-01), Juda et al.
patent: 3287250 (1966-11-01), Brown et al.
patent: 3634213 (1972-01-01), Coates
patent: 4025405 (1977-05-01), Dotson et al.
"Electroforming" by Spiro, 2nd Ed., 1971, p. 23.
Babinsky Andrew D.
Hora Charles J.
Peters Edward J.
Zeman Wayne P.
Andrews R. L.
Diamond Shamrock Corporation
Hazzard John P.
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