What are the main uses of anhydrous potassium fluoride?

Anhydrous calcium chloride is dry in nature, has strong water absorption power, and has a wide range of uses. In the matters involved in "Tiangong Kaiwu", its use is also apparent in various industries.

First, in the salt industry, when the sea is boiled as salt, the brine evaporates, and impurities are easily mixed in the salt. Anhydrous calcium chloride can remove water from it, making the salt purer. "Tiangong Kaiwu" says: "All salt is fried from sea brine, and it contains more water." Anhydrous calcium chloride can quickly absorb the remaining water in the brine, making the salt crystallize better, the particles are uniform, and there are few impurities. It can improve the quality of salt to meet the needs of people's livelihood and industry and commerce.

Second, in metallurgy. During metal smelting, the ore contains moisture, which affects the smelting process and metal purity. Anhydrous calcium chloride can be placed in the furnace or at the raw material to absorb water vapor, ensure the stability of the furnace temperature, and make the smelting reaction smooth. For example, "the method of smelting iron, the ore must be dry", anhydrous calcium chloride helps the ore to remove water, and promotes the smelting of iron. The iron is tough in texture and has few impurities. It can be used for equipment, construction, etc.

Third, it is shipped by boat. When sailing on the sea, the goods in the warehouse are vulnerable to moisture damage. Placing anhydrous calcium chloride in the cabin can ensure the drying of the goods. "When sailing on the sea, moisture invades", anhydrous calcium chloride absorbs moisture, protects grain grains, cloth, medicinal materials, etc., from mildew and rot, so that the goods exchanged for business are intact and travel all over the world. < Br >
Fourth, in the tanning industry. For leather tanning, it is necessary to remove moisture from the skin. Anhydrous calcium chloride can quickly absorb moisture in the skin, and the tanning aid penetrates evenly. Leather is flexible and durable. "Tiangong Kaiwu" records the method of tanning leather. Anhydrous calcium chloride is used in this process to improve the quality of leather and can be used for clothing, utensils and other good materials.

Anhydrous calcium chloride is used in people's livelihood, industry and commerce. It is indispensable to remove water and keep dry. It helps all industries to move in an orderly manner and produce abundant products.

What are the physical properties of anhydrous potassium fluoride?

Anhydrous calcium chloride is a common chemical substance, and its physical properties are quite unique. The details are as follows:
First, looking at its morphology, anhydrous calcium chloride is mostly white and hard lumpy, granular or powdery under normal conditions. This morphological feature makes it easy to store and use in many scenarios. Just like the records of the morphology of various materials in "Tiangong Kaiwu", it is its initial appearance, and the morphology of anhydrous calcium chloride is also a visual manifestation of its characteristics.
Second, when it comes to the melting point, the melting point of anhydrous calcium chloride is quite high, about 772 ° C. Such a high melting point indicates that its chemical structure is stable, and it requires a high energy to change its solid state. Just like ancient iron, it needs to reach a very high temperature to melt iron, and the same is true for anhydrous calcium chloride, which requires specific high temperature conditions to change its state.
Third, in terms of boiling point, its boiling point is about 1600 ° C. High boiling point means that in general environments, anhydrous calcium chloride can maintain solid or liquid stability, and is not easy to vaporize due to temperature fluctuations. This property makes it stable in many high temperature processes or specific environmental applications, and plays a corresponding role.
Fourth, the solubility is remarkable. Anhydrous calcium chloride is very soluble in water. When it comes into contact with water, it dissolves quickly, and the dissolution process releases a lot of heat. This phenomenon is like the wonderful change when the ancients mixed water with certain substances. The thermal effect of anhydrous calcium chloride dissolved in water makes it used in some scenes that require heat, such as self-heating food and other fields.
Fifth, it is highly hygroscopic. Anhydrous calcium chloride is like a "water absorption expert" and can quickly absorb moisture in the air. This property makes it often used as a desiccant, which plays a key role in preserving moisture-prone items, just like holding up a "moisture-proof umbrella" for items to ensure that items are dry and maintain good quality.

What are the precautions for the storage and transportation of anhydrous potassium fluoride?

For anhydrous calcium chloride, many precautions must be carefully observed during storage and transportation.

First word storage. Anhydrous calcium chloride is highly hygroscopic and easily absorbs moisture from the air and deliquescent. Therefore, when storing, be sure to choose a dry and well-ventilated place, and the container used should be tightly sealed to prevent external moisture from invading. If stored in an ordinary open container, it will turn into a puddle of solution in a few days, causing it to deteriorate and be useless. It is advisable to use sealed metal drums, plastic drums and other containers to keep it dry.

As for transportation, there are also many key points. During transportation, it is necessary to prevent the container from being damaged. Once anhydrous calcium chloride leaks, not only its own quality will be damaged, but also if it comes into contact with other goods, or causes other items to be damp. The cargo compartment of the vehicle should also be kept dry and clean, and there must be no signs of water accumulation or moisture. If it is transported on rainy days, strict protective measures should be taken, and tarpaulins and other objects should be tightly covered to prevent rainwater from soaking in. At the same time, transporters should also be aware of the characteristics of anhydrous calcium chloride, and handle it with care during operation to avoid violent vibration and collision causing the container to break.

In addition, although anhydrous calcium chloride is not flammable and explosive, it may come into contact with certain substances or react biochemically. Therefore, during transportation and storage, do not mix with substances that are easy to react with, such as active metals, alkaline substances, etc. In this way, the quality of anhydrous calcium chloride during storage and transportation can be ensured for subsequent use.

What are the production methods of anhydrous potassium fluoride?

Anhydrous zinc chloride, there are several ways to make it. One method is to combine zinc with chlorine. Put zinc in a container, pass chlorine into it, and zinc will melt into anhydrous zinc chloride when it encounters chlorine. This process needs to pay attention to the sealing of the container, and the temperature control is appropriate to prevent accidents. The reaction formula is: $Zn + Cl_ {2}\ stackrel {certain conditions }{=\!=\!=} ZnCl_ {2} $.

Another method, react zinc oxide with hydrochloric acid, first get zinc chloride solution, and then remove water. Take zinc oxide powder, slowly add it to hydrochloric acid, stir it to make it fully react, the reaction is: $ZnO + 2HCl =\! =\! = ZnCl_ {2} + H_ {2} O $. After the solution is finished, evaporate and concentrate, and then cool the crystallization to obtain zinc chloride containing crystalline water. After heating at high temperature, except for the crystal water, anhydrous zinc chloride can be obtained. However, when heating, it is suitable to avoid its oxidation in an inert gas environment.

There is a method of reacting zinc with hydrogen chloride gas. Put zinc powder in the reaction tube, pass hydrogen chloride gas, and heat it. This reaction can also give anhydrous zinc chloride, which should be: $Zn + 2HCl\ stackrel {\ triangle }{=\!=\!=} ZnCl_ {2} + H_ {2}\ uparrow $. When operating, pay attention to the escape of hydrogen to prevent its risk of deflagration.

All kinds of production methods have their own advantages and disadvantages, and must be based on actual needs, such as the availability of raw materials, the level of cost, and the purity of the product. Only by choosing an appropriate method can the purpose of producing anhydrous zinc chloride be achieved.

What are the effects of anhydrous potassium fluoride on the environment and human body?

According to "Tiangong Kaiwu", the impact of anhydrous calcium chloride on the environment and the human body is analyzed in detail.

Anhydrous calcium chloride has strong hygroscopicity and is widely used in environmental humidity control. In storage, putting anhydrous calcium chloride can keep the goods dry and avoid moisture and mildew. If it is in a humid place, such as the rainy season in the south, it can dehumidify, reduce indoor humidity, and make the residence comfortable. However, its hygroscopicity is strong, and there are also drawbacks. If it is scattered in the soil, it will absorb water in the soil, cause the soil to dry out, which is not conducive to plant root growth and water absorption. In the long run, it may cause soil compaction and affect vegetation ecology.

As for the impact on the human body, anhydrous calcium chloride is non-toxic and corrosive. If it is accidentally touched and not cleaned in time, it may cause burns, redness, swelling and pain to the skin. If its powder enters the eyes, it can damage the eye tissue, cause severe pain and discomfort, and in severe cases, it may affect vision. If eaten by mistake, it will irritate the mouth, esophagus and stomach, nausea and vomiting in light cases, and may cause gastrointestinal perforation and shock in severe cases.

And anhydrous calcium chloride is used to release heat in industrial production. Used in chemical processes, if the heat dissipation is improper, it can cause the local temperature to rise sharply, causing safety accidents, such as fires, explosions, etc., endangering the safety of production personnel and damaging the surrounding environment.

In summary, although anhydrous calcium chloride is useful for moisture prevention and dehumidification, it should be used with caution and properly protected and treated to avoid harm to the environment and human body.