How to control chloride ions in soda ash?
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Just regarding the production of alkali, there’s one issue: there are certain requirements for chloride ions in alkali products. So, how is it ensured during production that the chloride ion content in the products remains within the specified range? Thank you all for your advice!
In alkali products, the chloride ion content should be kept as low as possible. Reducing the chloride ions in soda ash can be achieved in two ways: 1. Filtration process: Use a caustic soda filter to wash away some of the chloride ions with water； 2. Liquid-phase hydration: Partial chloride ions are dissolved through the liquid-phase hydration of soda ash.
Thank you to the person above for the reply! We’re not a professional alkali producer; we only produce alkali products during the recycling of industrial waste. During this process, chloride ions in the mother liquor keep accumulating, thereby affecting the quality of the alkali products. Does it mean that when the chloride ion concentration in the mother liquor reaches a certain level, we must replace the entire batch of mother liquor? Even then, a certain amount of wastewater will still be generated. It’s quite frustrating :dizzy:
Isn’t it sufficient to continuously discharge the mother liquor during production while constantly adding fresh water, thereby keeping the salt concentration in the mother liquor below its maximum allowable level?
Is it possible to add a bypass system to process the mother liquor, so that fresh water can be added to the mother liquor while chloride ions are processed in the bypass treatment system and then returned, so that the chloride ion content of the mother liquor can be guaranteed?
Do you make sodium nitrate or sodium nitrite?
Reply to the post above: We do not produce sodium nitrite, nor do we produce sodium nitrate. Reply to the post above that； Isn’t the cost of treating chloride ions in an aqueous solution quite high? Or is there some industrially feasible solution? Originally, we only dealt with waste treatment; cost is also a crucial factor! :L
It is recommended to also produce products like ammonium chloride, thereby yielding two products
Chloride ions can react with ammonium ions to form ammonium chloride; you can add ammonia water to remove the chloride ions.
When the concentration of chloride ions reaches a very high level, is it feasible to send them to other processes for separate treatment?