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[Chemical Knowledge]：Production and manufacturing method and process flow of ammonium bifluoride

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Manufacturing method
of ammonium hydrogen fluoride
Ammonium hydrogen fluoride is an inorganic compound, which is widely used in the field of chemical production raw materials. It has excellent corrosion inhibition and metal surface treatment properties, so it has important applications in electroplating, etching and anti-corrosion engineering. This article will introduce the manufacturing method of ammonium bifluoride in detail.

1. raw materials and equipment

1. raw materials: hydrofluoric acid, ammonia
2. equipment: reaction kettle, stirrer, thermometer, pH meter, condenser, filter

2. manufacturing steps

1. the reaction kettle clean, add the metering of hydrofluoric acid, start the stirrer.
2. Slowly add ammonia water while observing the temperature and pH changes in the reactor.
3. when the pH value reaches the predetermined value, stop adding ammonia water, and continue stirring for a certain period of time, so that the reaction is fully carried out.
4. The reaction solution was cooled by a condenser to precipitate crystals of ammonium bifluoride.
5. The crystals are separated from the mother liquor using a filter to obtain the ammonium bifluoride product.
6. The crystals were washed with water and dried to obtain the final product of ammonium bifluoride.

3. Precautions

1. The reaction temperature and pH value should be strictly controlled during operation to avoid affecting product quality.
2. Ammonia has a pungent odor, and the operation should be carried out in a well-ventilated environment, and wear protective equipment.
3. After the reaction, the reaction kettle should be cleaned for the next use.

4. product quality standard

ammonium bifluoride product quality standard should meet the following requirements:

1. Appearance: white crystalline powder
2. Purity: ≥ 98%
3. Free acid (calculated as HF):≤ 0.5
4. Free base (calculated as NH3):≤ 0.3
5. Moisture: ≤ 0.5%

5. safety and environmental protection

1. Safety operation procedures shall be observed during operation to avoid accidents.
2. Waste mother liquor should be properly disposed to avoid environmental pollution.

6. yield and cost accounting

1. yield: according to the amount of raw materials and product quality, calculate the yield of ammonium bifluoride.
2. Cost accounting: According to the cost of raw materials, equipment depreciation, labor costs and other factors, calculate the production cost of ammonium bifluoride.

Through the above steps, we can produce ammonium bifluoride products that meet quality standards. In the production process, the process parameters should be strictly controlled to ensure product quality and production safety. At the same time, strengthen cost accounting and waste disposal to improve the economic and environmental benefits of enterprises.

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