Is it feasible to prepare sodium carbonate using lightly salted water?
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This post was last edited by sunjl1981 on January 6, 2013, at 19:48. Chlor-alkali plants that use brine all hope to minimize the amount of water added to their systems. According to the principle of system equilibrium, using less water allows for more brine to be utilized, thereby reducing costs. The amount of water required for preparing sodium carbonate is quite substantial. Is it possible to use dilute brine instead to prepare sodium carbonate, thereby reducing the overall water intake in the system? hcbbs!!.
Why aren’t the experts responding?! This can also increase the salinity of the brine. It’s necessary to analyze whether this is feasible; since implementing it would involve fixed investments, a thorough theoretical justification must be provided first.
This is a great idea. There’s no problem dissolving 12.5% sodium carbonate in dilute brine; the temperature of the brine is sufficient. The steam agitation in the mixing tank can be replaced with mechanical agitation. The issue regarding the sodium carbonate pipelines needs to be considered; here, it is recommended to use pipes with a PE steel framework. Under the effect of brine, frost resistance **is enhanced**. Regarding investment, simply adding pipelines will suffice; the cost isn’t high.
This plan is feasible. That’s how it’s implemented in some units. The cost is as mentioned above – it’s just an increase in the pipes, not high.
Friend, of course it’s possible; it saves both water and steam. There is one issue that needs to be resolved: the chlorine content in the brackish water during the configuration and operation phases, as well as the associated odor. It is feasible if the parameters improve after dechlorination and if membrane-based nitrogen removal operates properly.
May I ask which company has implemented it? A word of experience: Is it dechlorinated brine or brine that has undergone denitrification via membrane technology that is being used? ； What are the differences compared to regular water addition? Compared to before, what equipment needs to be added and what equipment needs to be removed?
Can we do a trial first to see how it goes? Many things are “manufactured” in laboratories; perhaps the test results can achieve the desired effects?
I suspect that the “common ion effect” will occur. Sodium carbonate itself tends to crystallize, thereby clogging pipes. Even at a concentration of 15%, it’s quite prone to crystallization; let alone when prepared using dilute saline solution. This could be tested experimentally. To prevent sodium carbonate from crystallizing, the final concentration of the sodium carbonate solution must be very low.
Seems like there are no common ions! What is the solubility of sodium carbonate? If not, is it possible to reduce the concentration of sodium carbonate? In any case, it would be prepared using dilute brine, right?
Your suspicion upstairs that sodium ion saturation could lead to precipitation is a possibility