Chemistry: electrical and wave energy – Processes and products
Patent
1979-10-01
1981-06-16
Andrews, R. L.
Chemistry: electrical and wave energy
Processes and products
204128, 204129, C25B 134, C25B 102
Patent
active
042736269
ABSTRACT:
In an electrolytic chlor-alkali cell, or bank of cells, having a plurality of electrolyte compartments containing electrode pairs (anodes and cathodes) and wherein a hydraulically-impermeable membrane separates the electrolyte compartments into catholyte portions and anolyte portions, said cell or cells being employed to produce chlorine at the anodes and caustic and hydrogen at the cathodes by the electrolysis of an aqueous alkali metal chloride electrolyte, improved operation is attained by flowing anolyte liquor from anolyte portion to anolyte portion, sequentially, while simultaneously, and in the opposite direction, flowing catholyte liquor from catholyte portion to catholyte portion, sequentially. The membrane substantially prevents Cl.sup.- from entering the catholyte liquor from the anolyte, and a high purity caustic, substantially free of salt, is produced.
REFERENCES:
patent: 2694680 (1954-11-01), Katz et al.
patent: 4057474 (1977-11-01), Kurtz et al.
patent: 4133730 (1979-01-01), DuBois et al.
patent: 4146438 (1979-03-01), DeNora et al.
Ezzell Bobby R.
Sorenson Marius W.
Andrews R. L.
Lee W. J.
The Dow Chemical Company
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