Removal of chlorate from electrolyte cell brine

Details Removal of chlorate from electrolyte cell brine Removal of chlorate from electrolyte cell brine

C - Chemistry, Metallurgy

25

B

204/64.2

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

Patent

CA 1214429

ABSTRACT A process for removing chlorate ions from a recirculating anolyte brine as typically used in membrane chlor-alkali cells is disclosed. In this, a portion of the circulating brine after dechlori- nation and resaturation with additional alkali metal chloride is diverted and treated with a stoichiomet- ric amount of hydrochloric acid to convert substant- ially all of the chlorate to chlorine gas and chlor- ide ion. When the process is performed in this man- ner, substantially lower quantities of acid are re- quired as compared to prior art processes and the problems with the generation of C102 are minimized.

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