Discussion on the production of soda from mirabilite
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As the title suggests, what are everyone’s thoughts on using mirabilite to produce soda? Considering both economic aspects and technical feasibility, can the wet-process method using mirabilite overcome the limitations of the current ammonia-soda method and the double-soda method?
The original poster’s idea is good, but the current cost-effectiveness makes it unfeasible
Mirabilite is now generally treated as waste, requiring money to be spent on getting rid of it; if it were possible to utilize it effectively, it would undoubtedly represent a significant scientific achievement.
The process for producing soda from mirabilite is not yet mature; furthermore, due to the high amount of crystal water contained in mirabilite and the low temperature at which it precipitates, it is difficult to control the process conditions. A few years ago, mirabilite was used to produce sulfuric acid (using the ion-exchange membrane process), but the concentration of sulfuric acid produced was low, resulting in low efficiency as well; it was therefore not economical.
Is there anyone in need of the technology for producing soda from mirabilite? I have proprietary technology that allows for a salt utilization rate of nearly 98%-99%, with no waste water or residues. :)
The pyrometallurgical process for producing soda from mirabilite is an old technique dating back over 100 years, and it cannot compete with the ammonia-soda process. The dilemma of the ammonia-alkali process is the excessive amount of calcium chloride generated as a by-product that cannot be dealt with. However, the production of soda from mirabilite generates large amounts of calcium sulfate as a by-product, and sometimes calcium sulfate is more difficult to handle than calcium chloride. Electrolytic methods have also been under study for decades; they are not profitable at all, but they can achieve zero emissions. Therefore, they still have some use in dealing with sodium sulfate that is produced as a by-product in industries such as organic synthesis.
The high-temperature reduction method for coal is still quite practical at present.
What method is this? The iterative method?
Saying that’s a lie might be a bit inappropriate. But if you believe it, you’re sure to be deceived. Don’t trust patents easily. A patent is merely something that differs from other people’s methods and is protected by money, but whether it is beneficial for industrial application is a completely different matter.