Concentrating solution in electrolytic diaphragm cell

Details Concentrating solution in electrolytic diaphragm cell Concentrating solution in electrolytic diaphragm cell

C - Chemistry, Metallurgy

25

B

204/123, 204/80

C25B 1/00 (2006.01) C25B 13/00 (2006.01) C25B 15/08 (2006.01) C25D 21/18 (2006.01)

Patent

CA 1152447

ABSTRACT OF THE DISCLOSURE A process for treating a dilute electrolytic solution to recover a concentrated solution therefrom in an electrolytic cell or in each of a plurality of such cells, divided by a per- meable diaphragm into a feed chamber and a recovery chamber pro- vided, respectively, with positive and negative electrodes or vice versa. The dilute electrolytic solution is fed to the feed chamber, and, while electrolysis is in progress between the elec- trode of the feed chamber and the electrode held in the recovery chamber in close proximity to, or in intimate contact with, the diaphragm, the concentrated electrolyzed solution is allowed to exude through the diaphragm into the recovery chamber, whereby the concentrated solution is extracted into the latter chamber. In the apparatus for practicing the process, either the negative or the positive electrode is held in the feed chamber and the other electrode is held in the recovery chamber in close proxi- mity to, or in intimate contact with, the diaphragm. The feed chamber is provided with an inlet for the electrolytic solution to be treated and also with an outlet for the treated solution. The recovery chamber is provided with a jet means for injecting, at the start of the electrolysis, part of the electrolytic solu- tion to be treated against the diaphragm and the latter elec- trode, a gas outlet through which the gas generated at the elec- trode during the electrolysis is released, and an acid outlet through which a concentrated electrolytic solution that has exuded into the recovery chamber as a result of the electrolytic treatment is taken out of the vessel.

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