Secondary brine nitrate limit
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Chlor-alkali processes have clear limits on the sulfate concentration in the secondary brine; when nitrate is present in the brine, could it affect the quality of the electrolyzed chlorine? Is there a specific limit for nitrate in the chlor-alkali process?
Where does the nitrate in your saline come from? Is it analyzed by measuring total nitrogen? If that’s the case, be careful; it could be ammonium ions, which can produce nitrogen trichloride during the saltwater electrolysis process, and that is a source of danger.
Thank you! Ammonium ions are indeed a major source of danger. This issue primarily concerns the presence of nitrate in salt. Existing processes are effective at removing nitrate, but the recycling of brackish water may lead to an increase in nitrate accumulation. Therefore, it is necessary to determine whether nitrate affects the oxygen content in chlorine gas, as well as to identify the acceptable limit for nitrate levels.