Can hydrogen peroxide remove free chlorine from high-purity hydrochloric acid?

Does sodium sulfite, which is not used nowadays, remove free chlorine?

Please keep an eye on it and learn from it*; let me know once the problem is resolved, thanks.

This post was last edited by zhanyl628 on 2019-8-26 at 09:05. Hydrochloric acid used for the regeneration of cation resins generally meets the requirements of Grade A or Grade B industrial synthetic hydrochloric acid as specified in GB320. The high-purity hydrochloric acid used by you (HG/T 2778), with a free chlorine content of Grade A at 20 mg/L and Grade B at 40 mg/L, already has a very low level and should be sufficient for resin regeneration; more attention should be paid to iron ions, unless there are special requirements for product production. If it is necessary to eliminate free chlorine completely, it is recommended to use hydrazine hydrate; hydrogen peroxide can also be tried (note that hydrogen peroxide is more effective in alkaline conditions!) ), but care should be taken regarding the impact on the resin, and it should not be used in excess.

Can’t understand it? What resin tower? What do you use your resin tower for? What resin?

Refining of secondary brine involves using chelating resins to remove divalent metal ions such as calcium and magnesium from the brine. Improve the quality of saltwater.

Resin that can withstand high-concentration hydrochloric acid – where did you buy this resin?

If you have any, send some for me to play with; if it’s good, I’ll buy it

1. Hydrogen peroxide is effective in removing free chlorine, as it is used to eliminate the interference of chloride ions during sodium hypochlorite testing. However, free chlorine is present in trace amounts; if too much hydrogen peroxide is used, it is possible that it could damage the resin, and this matter should be discussed with the manufacturer of the chelating resin. 2. Hydrazine – hydrated hydrazine. Do you see this term? Ammonia – obviously, this is an even less acceptable substance; deliberately adding ammonia to the electrolysis system is absolutely forbidden. We are all well aware of the horror of nitrogen trichloride. 3. To address the issue of free chlorine in hydrochloric acid at its source, it is essential to ensure proper combustion efficiency in the synthesis furnace as well as high cleanliness in the absorption system. In my opinion, there is no need to add any additives when free chlorine can be kept within the specified limits; a small amount of free chlorine merely results in a slight loss of chelating resin. After breaking and rebounding, a small amount of replenishment is sufficient each year.