Manufacturing Method of Ammonium Hydrogen Fluoride
Ammonium Hydrogen Fluoride is an inorganic compound widely used in the field of raw materials for the production of chemicals. 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 hydrogen fluoride in detail.
I. Raw materials and equipment
1. Raw materials: hydrofluoric acid, ammonia
2. Equipment: reaction kettle, stirrer, thermometer, pH meter, condenser, filter
II. Manufacturing steps
1. Clean the reaction kettle, add measured amount of hydrofluoric acid and turn on the stirrer.
2. Slowly add ammonia while observing the temperature and pH changes in the reactor.
3. When the pH reaches a predetermined value, stop adding ammonia and continue stirring for a certain period of time to allow the reaction to proceed fully.
4. Cool the reaction solution by means of a condenser to precipitate the ammonium hydrogen fluoride crystals.
5. Separate the crystals from the mother liquor using a filter to obtain the ammonium hydrogen fluoride product.
6. Wash the crystals with water and dry them to get the final product of ammonium hydrogen fluoride.
3. Precautions
1. The reaction temperature and pH value should be strictly controlled during the operation so as not to affect the product quality.
2. Ammonia has irritating odor, operation should be carried out in a well-ventilated environment, and wear protective gear.
3. The reaction kettle should be cleaned after the end of the reaction for the next use. Product quality standard
The product quality standard of Ammonium Hydrogen Fluoride should be in accordance with the following regulations:
1. Appearance: white crystalline powder
2. Purity: ≥98%
3. Free acid (HF): ≤0.5%
4. Free alkali (NH3): ≤0.3%
5. Moisture: ≤0.5%
5. Safety and environmental protection
1. Safety and environmental protection
1. operation regulations to avoid accidents. The waste mother liquor should be properly disposed of to avoid polluting the environment. VI. Yield and costing
1. Yield: Calculate the yield of ammonium hydrogen fluoride according to the amount of raw materials and product quality.
2. Cost accounting: according to the cost of raw materials, equipment depreciation, labor cost and other factors, calculate the production cost of ammonium hydrogen fluoride.
Through the above steps, we can make the product of ammonium hydrogen fluoride which meets the quality standard. During the production process, all process parameters should be strictly controlled to ensure product quality and production safety. At the same time, cost accounting and waste disposal should be strengthened to improve the economic and environmental benefits of the enterprise.
