Introduction to Chemical Purification Processes
After mastering filtration and drying techniques, we advance to chemical purification processes that achieve ultra-high purity levels in salt production. These methods target residual impurities like calcium ($Ca^{2+}$), magnesium ($Mg^{2+}$), and sulfates that filtration alone cannot fully remove. Chemical treatments such as centrifugation and ion exchange refine brine or crude salt solutions, ensuring industrial-grade purity above 99.5%.
Key benefits include:
- Enhanced separation efficiency for fine particles
- Selective removal of ionic contaminants
- Scalability for large-scale industrial operations
In salt refinement, these processes build on dried filtrates to produce pure sodium chloride ($NaCl$) for applications like food processing and chemical manufacturing.