Manufacturing method of ferric chloride
I. Introduction
Ferric chloride (FeCl3) is an important inorganic chemical widely used in the fields of water treatment, printed circuit board making, dyes, catalysts and so on. Therefore, it is of great practical significance to study the manufacturing method of ferric chloride. In this paper, the manufacturing method of ferric chloride will be introduced in detail, including raw material preparation, reaction process, post-treatment and product quality control.
II. Raw material preparation
1. Iron chips: use iron chips with high purity to ensure product quality.
2. Hydrochloric acid: industrial grade hydrochloric acid, the concentration is generally 30%~37%.
3. Reaction process
1. Add iron chips into the reactor, add a certain amount of water and stir well.
2. Slowly add hydrochloric acid, control the rate of acid addition, so that the reaction is carried out at a lower temperature.
3. A large amount of heat will be generated during the reaction, the reaction temperature needs to be controlled by cooling water to keep the temperature at 60~80℃.
4. After the end of the reaction, leave it for a period of time to make the solid precipitate, and the supernatant is ferric chloride solution.
4. Post-treatment
1. Pump the supernatant into the crystallization kettle and concentrate it by evaporation so that ferric trichloride crystals are precipitated.
2. Centrifuge the crystals to separate, and the obtained crystals are washed with a small amount of water to remove surface impurities.
3. Dry the washed crystals to get finished ferric chloride.
V. Product quality control
1. Ensure stable product quality by controlling the purity of raw materials and the rate of acid addition.
2. Carry out laboratory tests on the finished products to detect the purity, moisture, heavy metals and other indicators to ensure that the products meet the relevant standards.
VI. Precautions
1. In the operation process, the speed of adding acid should be strictly controlled to prevent the reaction from being too intense, which may cause safety accidents.
2. The equipment should be regularly maintained and serviced to ensure normal operation and improve production efficiency.
3. Operators should be professionally trained and familiar with the operating procedures and safety knowledge to ensure that the production process is safe and smooth.
VII. Waste treatment
1. Waste residue generated during the reaction process should be properly treated and can be sent to professional treatment plant for resource utilization or safe landfill.
2. Wastewater should be discharged after treatment to meet environmental protection standards to avoid pollution to the environment.
VIII.Conclusion
The manufacturing method of ferric chloride involves the preparation of raw materials, reaction process, post-treatment and product quality control. By strictly controlling the process parameters and operation points of each link, high quality ferric chloride products can be produced. At the same time, waste treatment and operator training are strengthened to ensure that the production process is safe and environmentally friendly and to improve the economic and social benefits of the enterprise.
