Parameters of magnesium oxide waste acid neutralization mother liquor

In the process of producing magnesium sulfate by neutralizing waste sulfuric acid with magnesium oxide, it is very important to control parameters such as the temperature, density, and pH value of the mother liquor resulting from the neutralization reaction, as these parameters directly affect the efficiency of magnesium sulfate production and the quality of the product. The specific values may vary depending on the actual process conditions; the following are only for general reference: 1. Temperature: The reaction temperature is usually maintained between 50-80°C. While too low a temperature is beneficial for improving the purity of magnesium sulfate crystals, it results in a slow reaction rate and low efficiency ； Conversely, excessively high temperatures may cause magnesium sulfate to decompose, affecting the yield. 2. Density: The density of the mother liquor in neutralization reactions usually needs to be controlled between 1.3–1.8 g/cm3. If the density of the mother liquor is too low, it may cause the unreacted magnesium oxide to be separated out prematurely, resulting in a decrease in the yield of magnesium sulfate ； Excessively high density may lead to a slow reaction rate and increased energy consumption. 3. pH value: Generally, the pH value of the neutralization solution should be controlled between 6 and 7. This is because within this pH range, the reaction between magnesium oxide and sulfuric acid to produce magnesium sulfate is most efficient, and it also causes less corrosion to the environment and equipment. The above are the basic operational parameters; the specific process parameters need to be optimized comprehensively based on factors such as equipment type, properties of raw materials, and product requirements. .