Electrolysis of aqueous solution of sodium chloride

Details Electrolysis of aqueous solution of sodium chloride Electrolysis of aqueous solution of sodium chloride

1978-05-02

1980-05-13

Andrews, R. L.

Chemistry: electrical and wave energy

Processes and products

204128, C25B 116, C25B 126

Patent

active

042027438

ABSTRACT:
An electrolysis of an aqueous solution of sodium chloride is carried out by employing a fluorinated cation exchange membrane having an ion-exchange capacity of 0.8 to 2.0 meq/g dry polymer and having carboxylic acid groups as functional groups and maintaining a concentration of an aqueous solution of sodium hydroxide in a cathode compartment in a range of 20 to 45 wt. % and maintaining a calcium concentration in the aqueous solution of sodium chloride to lower than 0.08 mg/liter.
The purification of the aqueous solution of sodium chloride to reduce the calcium concentration is carried out in a system comprising the first and second chelate ion-exchange towers which are connected through a detector for detecting impurities in the aqueous solution.

REFERENCES:
patent: 4040919 (1977-08-01), Eng
patent: 4065366 (1977-12-01), Oda et al.
patent: 4073706 (1978-02-01), Nagy
patent: 4123336 (1978-10-01), Seko et al.
Chem. Abstracts, vol. 79, 1973, Item 147837t.
Chem. Abstracts, vol. 85, 1976, Item 168892w.

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