Manufacturing method of dilute phosphoric acid
I. Introduction
Dilute phosphoric acid is an important raw material for the production of chemicals, which is widely used in the fields of food, medicine, agriculture and metallurgy. Therefore, it is of great significance to study the manufacturing method of dilute phosphoric acid to improve product quality, reduce production cost and promote industrial development. In this paper, a common manufacturing method of dilute phosphoric acid will be introduced.
II. Material and equipment
1. Material: phosphate rock, sulfuric acid, water.
2. Equipment: reaction kettle, filter, storage tank, pump, stirrer, thermometer, pH meter and so on.
3. Manufacturing method
1. Pre-treatment of phosphate rock: phosphate rock is crushed and ground into powder, and then sieved to obtain suitable particle size.
2. Acid digestion reaction: Add the pre-treated phosphate rock powder and sulfuric acid into the reaction kettle according to a certain proportion, and carry out the reaction under the action of stirring. The temperature and pH value should be controlled during the reaction to ensure the smooth progress of the reaction.
3. Filtration and separation: after the reaction is finished, the reaction solution is filtered to separate the solid impurities.
4. Dilution and adjustment: Add a certain amount of water to the filtered solution and adjust the concentration and pH of the solution to obtain the desired dilute phosphoric acid product.
4. Precautions
1. During operation, the reaction temperature and pH should be strictly controlled to avoid equipment corrosion and product quality problems.
2. Filtration should be ensured during the filtration process to avoid the influence of solid impurities on product quality.
3. In the process of dilution and adjustment, the concentration and pH value of the solution should be adjusted according to the product demand to ensure product quality.
V. Conclusion
The manufacturing method of dilute phosphoric acid involves several links, including pretreatment of phosphate rock, acid digestion reaction, filtration and separation, and dilution and adjustment. In the actual production process, the process parameters of each link should be strictly controlled to ensure product quality and production efficiency. Through the manufacturing method introduced in this paper, dilute phosphoric acid products that meet the requirements can be produced, providing reliable raw material guarantee for the production in related fields.
