The production principle of anhydrous sodium sulfate

The production process of anhydrous sodium sulfate is mainly achieved through two methods: thermal method and chemical method.
The thermal method involves heating hydrated sodium sulfate to a high temperature, usually exceeding 300 ° C, to expel water molecules. This process is carried out in a furnace or rotary kiln, where sodium sulfate hydrate is dried and then heated to high temperature. Then the water is evaporated, leaving anhydrous sodium sulfate as a crystalline solid.
On the other hand, chemical methods involve the reaction of sodium sulfate with acids (such as concentrated sulfuric acid). This reaction generates sodium bisulfate and water, which are then further heated to produce anhydrous sodium sulfate.
Both methods have their advantages and disadvantages. The thermal method is relatively simple and clear, but requires high temperature and longer processing time. On the other hand, chemical methods require the use of strong acids and careful handling, but are more efficient and time-consuming.
In addition to production methods, other factors such as the purity of raw materials, reaction conditions, and post-treatment steps can also affect the quality of the final product.