Chemistry: electrical and wave energy – Processes and products
Patent
1975-01-24
1977-07-19
Andrews, R. L.
Chemistry: electrical and wave energy
Processes and products
204 98, 204128, 204129, 204251, 204266, 204104, C25B 116, C25B 126, C25B 102, C25B 122
Patent
active
040367142
ABSTRACT:
A method and apparatus for the electrolysis of an aqueous solution containing alkali metal ions, for example, the electrolysis of brine to produce chlorine and caustic. In one embodiment, a composite membrane comprising at least an ion-conductive polymer and a metal permeable to alkali metal is used in an electrolytic cell. An illustration of such a polymer is a perfluorocarbon polymer containing sulfonic acid or sulfonate groups, in intimate contact with a layer of mercury. Another aspect is the use of elevated pressures or other techniques substantially to eliminate the presence of normally gaseous products from the electrolyte. For example, high pressures may be employed to dissolve chlorine in a brine electrolyte and/or liquefy it. In another aspect, sodium sulfate is electrolyzed in a cell comprising a composite membrane, a formaminous anode, and a diaphragm between the composite membrane and anode; the oxygen produced is withdrawn through the anode.
REFERENCES:
patent: 1109311 (1914-09-01), Allen
patent: 2681320 (1954-06-01), Bodamer
patent: 2749301 (1956-06-01), Rosenbloom
patent: 3282875 (1966-11-01), Connolly et al.
patent: 3770611 (1973-11-01), Barnabe
patent: 3773634 (1973-11-01), Stacey et al.
patent: 3901774 (1975-08-01), Motani et al.
"X. R. Perfluorosulfonic Acid Membranes-New Product Information" E. I. DuPont de Nemours & Co., 10-1-69.
Andrews R. L.
E. I. Du Pont de Nemours and Company (Inc.)
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