Electrolytic production of alkali metal chlorates/perchlorates

Details Electrolytic production of alkali metal chlorates/perchlorates Electrolytic production of alkali metal chlorates/perchlorates

1990-11-29

1992-04-14

Niebling, John

Chemistry: electrical and wave energy

Processes and products

204 95, 204129, C25B 128

Patent

active

051044994

ABSTRACT:
The alkali metal chlorates (or perchlorates) are produced by electrolyzing the anolyte contained in the anode compartment of an electrolytic cell compartmentalized by means of a selectively permeable cationic membrane into said anode compartment and a cathode compartment, said anolyte having a pH ranging from about 6.2 to about 6.6 and comprising an aqueous solution of from about 100 g/l to about 200 g/l of the corresponding alkali metal chloride (or chlorate) and such amount of the desired alkali metal chlorate (or perchlorate) that the final product chlorate (or perchlorate) may be directly crystallized from the electrolyzed anolyte, and said cathode compartment containing a catholyte comprising an aqueous solution of the corresponding alkali metal hydroxide and wherein hydrogen gas is evolved.

REFERENCES:
patent: 3518173 (1970-06-01), Crane
patent: 3518180 (1970-06-01), Grotheer
patent: 3878072 (1975-04-01), Cook, Jr. et al.
patent: 3897320 (1975-07-01), Cook, Jr.
patent: 4627899 (1986-12-01), Smith et al.
patent: 5004527 (1991-04-01), Millet et al.
Extended Abstracts, Fall Meeting, Honolulu, Hawaii, 18-23 Oct., 1987, vol. 87-2, pp. 1629-1630, abstract No. 1177: A. Tasaka et al.: "Apparent activation energies for electrochemical chlorate-formation reaction on DSA-type electrode", p. 1629, colonne de gauche, lignes 13-32, colonne de droite, lignes 1-6.

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