Seek purification processes for industrial sodium carbonate and ammonium chloride to produce refined reagent-grade products. Those who know the way, please send it over
Thread Content
Seek purification processes for industrial sodium carbonate and ammonium chloride to produce refined reagent-grade products. Those who are knowledgeable please contact and leave a message
This post was last edited by mkp369 on 2018-5-21 09:33. Both of the products mentioned above are produced using the ammonia-alkali process; the main impurity in sodium carbonate is chloride ions, while the main impurities in ammonium chloride are sodium ions and sulfate ions. How can these impurities be removed?
Refining these two products is not that difficult.
The key is cost-effectiveness, and multiple crystallizations can solve this problem.
Multiple crystallizations result in low yields, poor economic efficiency, and are also harmful to the environment
This post was last edited by mkp369 on 2018-5-21 09:36. The chlorine content in industrial-grade sodium carbonate ranges from 0.3% to 0.7%; only about one-tenth purification can be achieved through a single recrystallization process. The required level for reagents is 0.002%, and at least three recrystallizations are necessary.
Why was only the crystallization method considered?
What other options are there besides crystallization?
Ammonium chloride is a double-alkali product, not an ammonia-alkali product.
The chlorine content in industrial-grade sodium carbonate can be controlled to well below 0.3%.