Sodium hypochlorite solution, a by-product of chlor-alkali production
Thread Content
Hello everyone, I have a question. Currently, sodium hypochlorite is widely used for water disinfection; it comes in the form of ready-made solutions with concentrations of around 5%-10%, or it can be produced by electrolyzing dilute saltwater to obtain solutions with concentrations between 0.5%-0.8%. How is ready-made sodium hypochlorite manufactured in the chlor-alkali process? ? Why are bromide salts present in it? I would be grateful if some experts could help me answer this question. Thank you. Also, where can I buy ion exchange membranes? I don’t use them very often; they’re mainly for laboratory use
1. The finished product, sodium hypochlorite, is a by-product in the production of chlor-alkali chemicals; its main production stage is the chlorine treatment process – specifically the section for handling excess chlorine and chlorine generated in case of accidents； 2. Bromide salts are present in the finished product; theoretically, this is unlikely, and I have never encountered such a situation ； 3. I can help with small-area ion membranes; phone number: 18841466218.
Finished sodium hypochlorite is a by-product in the chlor-alkali process; it is obtained by using caustic soda solution to absorb chlorine gas. It can be a standard product, or it can be sodium hypochlorite produced by absorbing chlorine gas emissions. The difference lies in the concentration, as sodium hypochlorite tends to decompose, and therefore the concentration of sodium hypochlorite produced by absorbing emissions is lower
The final product is chlorine obtained through the reaction of chlorine gas with caustic soda, with a high degree of purity; bromine is present in the electrolyte salt.
Okay, thank you. I’ll reach out to you if I need anything.:handshake
What is the bromine content in salt? What kind of salt is used for electrolyte salts?
Okay, thank you. I saw earlier that some standards specify a certain level of bromine in the final sodium hypochlorite product, and I was curious as to where this bromine comes from, because in water disinfection, bromine is a harmful substance
Floors 3 and 4 have already discussed the production of sodium hypochlorite from ion-exchange membrane caustic soda exhaust gases. Speaking only about the issue of bromide salts, these are generally not used as indicators for testing in the production of caustic soda using ion exchange membranes; in the final product, their presence is simply indicated as part of the total salt content. 40 ppm serves as the threshold between premium and first-grade quality levels. The source of bromide salts is the raw salt, which is the main material used in the production of ion-exchange membrane caustic soda; however, this is not apparent without conducting tests. Bromide salts do not end up in the final caustic soda product, nor do they have any impact on the ion-exchange membranes. They circulate in the brackish water, with part of them going along with chlorine, so their concentration in sodium hypochlorite does not exceed 10 ppm, meaning there is no significant impact. The bromide content in saltwater depends on the type of salt. Seawater generally contains very little bromide these days, as bromine plants are built alongside seawater extraction facilities; we once analyzed lake salt from Chaka in Qinghai, and its bromide content was around 30PPM.
Thank you so much. Indeed, the chlor-alkali industry is the major sector for electrolyzing saltwater, and it boasts many outstanding experts.:handshake