Manufacturing method of magnesium nitrate
I. Introduction
Magnesium nitrate is an important inorganic chemical, widely used in agriculture, medicine, food, metallurgy and other fields. Therefore, it is of great practical significance to study the manufacturing method of magnesium nitrate. This paper will introduce the manufacturing method of magnesium nitrate, including raw material preparation, reaction process, post-treatment and product quality control.
II, raw material preparation
The manufacture of magnesium nitrate requires the use of nitric acid and magnesium oxide as raw materials. Among them, nitric acid can be used industrial grade nitric acid, and magnesium oxide needs to use high purity magnesium oxide powder. In the process of raw material preparation, need to pay attention to the following points:
1. Control the purity of raw materials: in order to ensure product quality, need to use high purity magnesium oxide powder and industrial grade nitric acid.
2. Control the ratio of raw materials: according to the chemical formula of magnesium nitrate, the molar ratio of nitric acid and magnesium oxide should be 2:1.
3. Reaction process
The manufacture of magnesium nitrate adopts wet process, the specific steps are as follows:
1. Add the magnesium oxide powder to a certain amount of water, stir well, and make magnesium oxide suspension.
2. Slowly add nitric acid into the magnesium oxide suspension while stirring to make it fully reacted.
3. The pH is controlled within a certain range during the reaction to ensure the reaction and the quality of the product.
4. At the end of the reaction, filter, wash and dry to obtain magnesium nitrate product.
In the reaction process, the following points need to be noted:
1. Control the speed of adding acid: adding acid too fast will lead to local over-acid, affecting product quality.
2. Control the reaction temperature: too high reaction temperature will lead to product decomposition, affecting product quality.
3. Control pH value: too high or too low pH value will affect the purity and yield of the product.
4. Post-treatment
After the reaction, the product needs to be post-treated, including filtration, washing, drying and other steps. In these steps, it is necessary to pay attention to the following points:
1. Filtration: Use suitable filtration equipment to ensure the purity of the product.
2. Washing: Wash the product with pure water to remove impurities.
3. Drying: adopt suitable drying equipment, control drying temperature and time to ensure product quality.
5. Product quality control
In order to ensure the quality of magnesium nitrate products, it is necessary to carry out quality control of the products, including purity, particle size, moisture content and other aspects of the test. In these tests, it is necessary to pay attention to the following points:
1. Purity test: Use suitable analytical methods, such as titration, spectrometry, etc., to test the purity of magnesium nitrate in the product.
2. Particle size detection: Adopt equipment such as particle size analyzer to detect the particle size distribution of the product to ensure the fluidity and usability of the product.
3. Water content detection: adopt dry weight loss method and other methods to detect the water content of the product to ensure the stability and service life of the product.
VI.CONCLUSION
The manufacturing method of magnesium nitrate includes raw material preparation, reaction process, post-treatment and product quality control. In the manufacturing process, it is necessary to strictly control the factors of raw material purity, proportion, reaction conditions, post-treatment process and product quality to ensure the quality and yield of the product. At the same time, it is necessary to choose suitable equipment and process according to the actual situation to improve the production efficiency and economic benefits.
