Pyridine, 4-bromo-2-chloro-

4-Y-2- Tan, both of which are ancient characters, and its physical properties are difficult to find exact details in ancient books. However, it can be briefly inferred according to relevant principles and similar substances in later generations.
, from water, means dredging and circulating water, or also refers to a type of water body. The physical properties of water, at room temperature and pressure, are colorless, odorless and transparent liquids, with fluidity, a density of about 1 gram/cubic centimeter, a boiling point of 100 ° C at standard atmospheric pressure, and a freezing point of 0 ° C. If is another name for water or related water bodies, it should have the basic physical properties of water. And the water flow through the dredged land, or due to environmental impact, may contain impurities, or affect its density, transparency, etc. < Br >

, the ancient same as "carbon". Carbon is a non-metallic element with a variety of allotropes. The common diamond has extremely high hardness and is the hardest substance in nature. It has a high refractive index, dazzling brilliance and good thermal conductivity. Graphite is soft, greasy, and can conduct electricity, making it a good conductive material. Amorphous carbons such as charcoal and coke have adsorption properties, especially activated carbon, which has strong adsorption capacity. If
refers to carbon or its related forms, it should have the common physical properties of carbon.
Although the exact physical properties of 4--2-Tan are not detailed in ancient books, the characteristics and related principles of water and carbon can be used to have a general understanding of them.

4-Ether-2-alkane has special properties to it. For ethers, it is one of the compounds, and its molecule contains ether, that is, the oxygen atom is connected to the alkyl group. Among them, the chemical properties of 4-ether-2-alkane can be described in general terms.
First, the solubility of its physical properties is involved. Due to the existence of ether, the solubility of 4-ether-2-alkane in water is poor, the molecular properties are weak, and the interaction between water molecules is intense. However, in the multi-soluble solution, the ether has good solubility, such as ethanol, ether, etc. This is due to the principle of "similar phase dissolution", which has the action force of the soluble molecule to make it dissolve.
Furthermore, in terms of its chemical reaction activity. The ether phase of 4-ether-2-alkane is determined, but it can also be reversed under specific conditions. In case of acid, the ether can be cracked. For example, iodine acid cooperates, and the ether can be cracked to form a phase of iodine-substituted alkanols. In this reaction, the oxygen atom of the ether interacts first, making the ether more susceptible to cracking, and the iodine can attack the base to generate iodine-substituted alkanes.
In addition, the alkyl moiety of 4-ether-2-alkane also has anti-oxidation activity. If there is an α-alkyl atom on the alkyl group, it can be oxidized under the action of suitable oxidation. For example, by oxidizing the alkyl acid and the like, α-alkyl can be oxidized to the alkyl group, so that the molecule can be changed.
And because of the ether and alkyl groups in its molecules, it can be used as an important medium for the synthesis of alkyl. In the synthesis of alkyl, its chemical properties can be used to improve the performance of cracking ether or alkyl groups, and other functional compounds can be introduced to improve the properties of alkyl compounds.
Therefore, the chemical properties of 4-ether-2-alkane due to its special molecular properties and its own characteristics are of great significance in the research and synthesis of chemical compounds.

4.2 In the past, the main use of energy is in the process of making things. In the process of making things, it is necessary to use the method of transformation. The nature of the product can be used to extract the oxygen in the high temperature, so that the product can come out of the original.

The "Heavenly Engineering", its performance and smelting technology, also have a similar reason. In the process of smelting, the fuel and stone are co-placed in the system, and the high temperature is reversed, so that the product can be obtained. In this process, it can be used as a raw material. The opposite reason is that in the process of encountering high temperature, the oxygen has the power to be reconciled, so the oxygen is removed, and the water itself is transformed, and the solution is obtained from the combination.
In addition, the use of raw materials and other things has its own unique characteristics. First, the risk of dyeing the waste water, the use of carbon as a source, carbon dioxide generation, etc., is more accurate. Second, the original ability of the product can be effectively improved under specific high-quality conditions.
Furthermore, in the process of engineering, the use of the product can make the product more refined. Because of its anti-phase and, it can be less introduced, which is beneficial to the acquisition of high-quality products. Therefore, in terms of its clarity, efficiency and ability to improve, it has become an indispensable thing in the process of metallurgy, and it has a very important position, which is where the main purpose of the metallurgy can be derived from the stone in the process of metallurgy.

To make a four-way and two-way tool, the method is as follows:
First, good, and rare stone. This is fundamental. The amount of good quality is sufficient, and the mould can be refined, so that the tool is solid and durable. If the stone is not good, the tool will be brittle and easy to fold.
Secondary metallurgy. Good stone, placed in a high layer. Using charcoal fuel, the drum can support combustion to raise the temperature. Wait for the stone to melt into water, remove the surface scum, and improve the temperature. This process needs to control the heat, the fire is large and the water is low, and the fire is small. The amount of stone melts, and the shadow is high.
Re-manufacture. Take the appropriate mold, use clay or green materials, and carefully make it. The shape and size of the mold are precise, and they fit the four-dimensional and two-dimensional patterns. Pour the raw water into the mold and form it cold. When making, pay attention to the pouring speed and uniformity of the water, whether the utensils are prone to pores, trachoma and other defects.
and processing. The utensils are formed, and they should be polished and trimmed. Grind off the corner burrs to make the surface smooth. If necessary, use a carving knife to carefully carve. In this step, ask for patience, so that the utensils are both beautiful for use.
The most expensive. To check the quality of the utensils, check whether their weight is equal to four or two, check whether their shape is complete, and check whether their hardness is sufficient. Those who fail to pass the test will be rebuilt. In this way, the utensils that meet the requirements of four or two directions can be found.

4-Mercury-2-cyanide is used in storage and transportation, and many precautions need to be paid attention to in detail.
Mercury is a highly toxic metal element, which is liquid at room temperature and volatile. When storing mercury, the first way to seal it is to use a special container to prevent the volatilization of mercury from escaping, causing pollution to the environment and endangering the surrounding people and animals. And the storage place must be cool and dry, protected from heat and light, and its heat is easy to accelerate volatilization. In addition, the storage site should be equipped with a good ventilation device. If there is a small amount of mercury volatilization, it can be quickly discharged to the outside and reduce the indoor mercury concentration. When transporting mercury, the packaging must be sturdy and tight. It is often encapsulated in metal cans or special glass bottles, and filled with buffer materials to prevent mercury leakage caused by the collision and damage of the container during transportation. Transportation vehicles also need ventilation equipment and emergency treatment equipment. In case of mercury leakage, they can be disposed of in time.
Cyanide is highly toxic, and a little can kill people. When storing cyanide, a special warehouse must be used. The warehouse should be cool, dry and well ventilated. It should be stored in isolation from acids, flammable substances, oxidants, etc. Because cyanide will release highly toxic hydrogen cyanide gas in contact with acid, and there is a risk of explosion in case of oxidants and flammable substances. The warehouse should be managed by a special person, and the registration system for entering and leaving the warehouse should be strict to ensure that the amount of cyanide is accurate and the flow direction is clear When transporting cyanide, the packaging must meet strict standards and be labeled highly toxic. It is strictly forbidden to mix with the above contraindicated substances during transportation, and the transportation personnel should be professionally trained and familiar with the characteristics of cyanide and emergency treatment methods. Pay close attention to the packaging conditions on the way. If there is any leakage, deal with it quickly according to the plan, evacuate the surrounding people, and prevent poisoning accidents.