Process for electrolysis of sodium chloride by use of cation...

Details Process for electrolysis of sodium chloride by use of cation... Process for electrolysis of sodium chloride by use of cation...

C - Chemistry, Metallurgy

25

B

204/64.2

C25B 1/46 (2006.01) B01D 1/26 (2006.01) C25B 15/08 (2006.01)

Patent

CA 1132481

ABSTRACT OF THE DISCLOSURE A process is provided to enable electrolysis of sodium chloride in an electrolytic cell divided into the anode chamber and the cathode chamber by a cation exchange membrane, where well brine is used as the starting mate- rial for the electrolysis. Dilute aqueous sodium chloride solution formed as the result of the electrolysis is with- drawn from the anode chamber and subjected to concentra- tion for re-use as the starting material, concentration preferably being achieved at least partially by use of heat generated during electrolysis. The dilute solution is withdrawn after depletion to a sodium chloride concen- tration of 100-250 g/liter and concentrated to a concen- tration ratio in the range 1.05 to 3.00.

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