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Sodium bifluoride, what is the main use of Solid
Sodium difluoride solids have a wide range of uses. In the field of industry, it is often an etchant. Such as making semiconductor chips, this is used to etch silicon wafers, accurately shape them, and make the chips have good function and stability. In glass manufacturing, it can assist the surface treatment of glass, making it brighter, increasing light transmittance, and strengthening its wear resistance.
In metallurgy, it can be used as a flux. When melting metals, it reduces their melting point, promotes impurity separation, improves metal purity, and facilitates metal molding to make products of high quality.
In the field of chemical synthesis, it is a useful reagent. Catalyze a specific reaction, speed up the reaction rate, guide the reaction to the desired product, and help chemists obtain the desired compound.
In agriculture, or for soil improvement. Adjust soil pH, increase soil fertility, provide nutrients for plant growth, prevent diseases and pests, and protect the healthy growth of crops.
In medicine, it may have the ability to disinfect and sterilize. In some external drugs or oral care products, it can inhibit bacteria, reduce inflammation, and protect oral and skin health.
From this point of view, sodium difluoride solids have extraordinary functions in the fields of industry, metallurgy, chemistry, agriculture, and medicine. They are also important for the development of many industries.
Sodium bifluoride, what are the physical properties of Solid
Sodium bifluoride (Solid), its physical properties are as follows:
This substance is a white crystalline powder at room temperature, which looks like frost and snow, and has a fine texture. Its melting point is about 160.5 ° C. When the temperature rises to this point, it is like solid ice when it is warm, and gradually converts from the solid state to the liquid state. When the boiling point is reached, this substance dissolves into a gaseous state and dissipates, but the exact boiling point data varies depending on the experimental conditions. It is around the decomposition temperature, and it is easy to decompose due to heat, making it difficult to measure the precise boiling point.
Its density is relatively large, and it feels sinking in the palm of the hand. It is about 2.45 g/cm ³, which is slightly heavier than the common material. It is soluble in water. When it enters the water, if salt melts into soup, it will disappear quietly, and the aqueous solution formed will be acidic. This is because difluoride ionizes hydrogen ions in water.
In addition, this substance has strong water absorption. In humid air, it will gradually deliquescent like a number of sponges. It needs to be properly sealed and stored to prevent its properties from changing and affecting use. Its appearance is white and pure, with no obvious smell. Although it is odorless, it is corrosive. When using it, do not be careless and need to be careful to protect it from contact with the skin and eyes to avoid damage.
Sodium bifluoride, Solid what to pay attention to when storing
Sodium difluoride solids, when hiding, all kinds of things to pay attention to, must not be ignored. This substance is corrosive, touch, smell or take it by mistake, can harm the body.
The first heavy storage place. It should be placed in a cool, dry and well ventilated place. Avoid direct sunlight, because it is heated or causes changes in properties, it will damage its quality and increase the risk of danger.
Furthermore, the packaging must be tight. Choose a corrosion-resistant device, seal it and store it to prevent moisture, air, etc. from connecting with it. Otherwise, it may react and reduce its purity, which will also cause safety.
Repeat, isolate from other things. Do not mix with flammable, explosive or oxidizing materials. Due to its chemical activity, mixing can easily cause violent reactions, causing fires, explosions and other disasters.
Also, there should be obvious warning signs in the storage place. Make everyone aware of the danger, do not approach and do not touch. And those in charge of the possession must be professionally trained to understand its nature, know its danger, and handle it properly.
In short, the storage of sodium difluorinated solids, in the place, in the device, in isolation, in the logo, and in the personnel, must be done with caution, and not be sloppy at all, in order to ensure safety and security, and the material is not damaged.
Sodium bifluoride, Solid safety precautions during use
Sodium difluoride solids, when using it, all kinds of safety matters must not be ignored.
First protective gear. Those who use this thing should wear appropriate protective clothing, such as protective clothing and protective gloves, to prevent it from touching the skin and causing damage. And when wearing goggles, cover your eyes to prevent materials from splashing into your eyes and damaging your eyes.
Furthermore, the operating environment must be well ventilated. If this material is in the air, or releases harmful gases, good ventilation can reduce its concentration and ensure the safety of breathing. In a place with poor ventilation, use respiratory protective equipment to protect the way of breathing.
Repeat, when using this thing, do not approach fire or heat sources. Sodium difluorinated solid or flammable, in case of fire or hot topic, it is dangerous, and there is a risk of fire and explosion.
Also, after using this material, it should be properly disposed of. Do not discard it at will to prevent pollution to the environment. According to relevant regulations, collect it in categories and hand it over to qualified persons for disposal.
In addition, before operating, be sure to clarify its nature, hazards and emergency measures. If you accidentally touch it, or inhale or eat it, know how to give first aid. If you touch the skin, rinse with plenty of water immediately; if you enter the eyes, rinse with water and seek medical attention immediately.
In short, the use of sodium difluoride solids, protection, ventilation, fire prevention, proper disposal, and emergency measures are all important and cannot be ignored, so that security is safe.
Sodium bifluoride, Solid production process is how
The process of sodium fluorodization (that is, sodium hydrogen fluoride, $NaHF_ {2} $) is related to the chemical industry. The first raw material of the method is often based on hydrofluoric acid and sodium carbonate or sodium hydroxide.
Take an appropriate amount of hydrofluoric acid first. This is a strong acid with strong properties and needs to be handled with care. Put it in a corrosion-resistant vessel and slowly add sodium carbonate or sodium hydroxide. Take sodium carbonate as an example, it is combined with hydrofluoric acid, as the right response: $2HF + Na_ {2} CO_ {3} = 2NaF + H_ {2} O + CO_ {2}\ uparrow $, but if you want to obtain sodium fluorodization, you need to deal with it later.
At first, the resulting sodium fluoride solution is blended with hydrofluoric acid, and the amount of the two is controlled, so that the hydrofluoric acid is slightly exceeded, so that this reaction can be generated: $NaF + HF = NaHF_ {2} $. This should be completed, the solution contains sodium fluoride.
Then concentrate the solution, and heat the water to gradually remove, and the solution gradually thickens. However, the degree of heat needs to be carefully controlled. If it is too high, the product will be lost. When a certain concentration is reached, there will be crystallization, which will cool down and promote the total precipitation of crystals.
After the crystallization is completed, the crystals will be taken by filtration, and the alcohol will be rinsed to remove its impurities, and it will dry quickly to prevent moisture. In this way, the solid of pure sodium fluoride dimer can be obtained. The whole operation, protection must be weeks, because of its corrosion, toxicity, must not be ignored.