2-Chloropyridine-3-carbonyl chloride

2-%E6%B0%AF%E5%90%A1%E5%95%B6, 3-%E7%94%B2%E9%85%B0%E6%B0%AF, both of these are important things.
2-%E6%B0%AF%E5%90%A1%E5%95%B6, is the key to starting a fire. In many situations, wanting to make a fire to warm, cook, or light a beacon to send a signal during a war depends on this. It can make the fire ignite quickly and play a crucial role. Without this thing, it is more difficult to make a fire, and many activities that rely on fire are also difficult to carry out.
As for 3-%E7%94%B2%E9%85%B0%E6%B0%AF, its main uses are very wide. First, in medical treatment, it has the effect of healing wounds. It can be used to smear wounds, help them heal and relieve pain. Second, in the field of craftsmanship, it is also indispensable. When casting artifacts, metals can be better fused, shaped, and the quality of artifacts can be improved. Third, in military applications, it also has important value. It can be applied to weapons to enhance their protection and durability, and play an important role on the battlefield.
Although the two have different uses, they both play a pivotal role in people's lives, production, and military affairs, and many other aspects are affected without one.

The method of making ammonia has existed in ancient times, and it depends on natural production. In recent times, chemical refinement and artificial synthesis have flourished. Among them, the Haber-Bosch method is the key to synthesizing ammonia.
Haber-Bosch method began in the early 20th century. At that time, the German chemist Haber, after repeated trials, found that under high temperature, high pressure and catalyst conditions, nitrogen and hydrogen can be synthesized into ammonia. The reaction formula is as follows: N 2 + 3H 2 NH 2. This process needs to be carried out in an environment with a high temperature of about 500 degrees Celsius and a high pressure of about 20 to 30 megapascals, using iron as a catalyst. High temperature can increase molecular activity and accelerate the reaction; high pressure promotes the balance to move in the direction of generating ammonia.
In addition, there are other catalysts that replace iron, such as ruthenium-based catalysts. Ruthenium catalysts have good activity and can synthesize ammonia under relatively mild conditions. However, their cost is high and they have not been widely used.
Another biological nitrogen fixation method. In nature, many microorganisms, such as rhizobium, can convert nitrogen into ammonia at room temperature and pressure. This is a biological mechanism that uses enzymes to gently fix nitrogen. Although it is difficult for humans to fully simulate, studying the principle of biological nitrogen fixation may open up new avenues for ammonia synthesis.
There is also an exploration of electrochemical synthesis of ammonia. This is the use of electrical energy to cause nitrogen and hydrogen to react on the surface of the electrode to generate ammonia. Its advantage is that it can be operated at room temperature and pressure, which is expected to reduce energy consumption and pollution. However, the current technology is still in the development stage, and the efficiency needs to be improved.
In summary, the method of synthesizing ammonia, Haber-Bosch method is commonly used in industry, while biological nitrogen fixation, electrochemical synthesis and other methods have potential. It needs to be further studied and improved in order to find a better way to synthesize ammonia and meet the needs of industry and people's livelihood.

Dimethyl ether is an important chemical raw material with unique physical properties.
Looking at its properties, dimethyl ether is a colorless, odorless and slightly ether-scented gas at room temperature and pressure. Its boiling point is very low, about -24.9 ° C, which makes it easy to convert from liquid to gaseous and easy to volatilize. Because of its low boiling point, it is quite useful in many scenarios that require rapid vaporization.
Furthermore, the melting point of dimethyl ether is about -141.5 ° C. It can also maintain a relatively stable state at low temperatures and is not prone to complex physical changes due to temperature reduction.
When it comes to density, its gaseous density is about 1.97 kg/m ³, which is slightly heavier than air. The density of the liquid is about 0.661 kg/L. This density allows it to store a certain amount of dimethyl ether per unit volume during storage and transportation, and it is different from the density of common liquids. It needs to be paid attention to in actual operation.
Dimethyl ether also has good solubility. It is soluble in water and can also be miscible with most organic solvents, such as ethanol, acetone, etc. This solubility makes it an excellent solvent in chemical production, assisting in the progress of various chemical reactions, or used in the extraction and separation of substances.
In addition, the combustion performance of dimethyl ether is also worth mentioning. When it burns, the flame is blue, the combustion is relatively full, and the calorific value is high. The combustion products are mainly carbon dioxide and water, which is relatively clean and environmentally friendly. This combustion characteristic has attracted more and more attention in the energy field and is expected to become one of the clean energy sources to replace traditional fossil fuels.

Mercury is a highly toxic substance, and many should be avoided when storing and transporting it, so be careful.
Mercury is mobile and volatile. At room temperature, it will dissipate into the air. If people inhale it, it will damage their health, especially the brain, kidneys and other organs. Therefore, when storing mercury, the first seal is heavy. When it is stored in a special container, the container must be solid and airtight to prevent the leakage and volatilization of mercury. Thick-walled glass bottles or metal cans are commonly used. The top of the bottle should be tightly sealed and reinforced with wax seals to prevent it from contacting the air.
The place where mercury is stored should be cool and dry, protected from heat and light. Heat accelerates the volatilization of mercury, and light can also promote its chemical reaction, causing its properties to change. The temperature of the warehouse should be controlled between 15 and 25 degrees Celsius, and the humidity should be 40% to 60%. And it must be kept away from fire, power and other heat sources to prevent accidents.
In the transportation of mercury, it is also necessary to pay more attention. The packaging must be stable, mostly in a strong wooden box or metal box. The box is filled with soft and good adsorption materials, such as vermiculite, diatomite, etc., so that the mercury bottle is fixed in the box without shaking and colliding. During handling, handle it with care, and it is strictly forbidden to throw or roll to prevent the container from being damaged and the mercury liquid from leaking out.
If unfortunately there is a mercury leak, emergency measures should be taken as soon as possible. Evacuate the crowd first, open windows for ventilation, and reduce the concentration of mercury in the air. After sprinkling sulfur powder on the place where the mercury leaks, sulfur and mercury are quickly synthesized into mercury sulfide, and its toxicity is greatly reduced. Then carefully collect mercury sulfide and dispose of it properly.
The storage and transportation of mercury is related to personal safety and environmental safety. Everything must be done in accordance with strict regulations, and no slack can be made to ensure that nothing goes wrong.

At present, the cost of oxygen flames in the city varies depending on the amount of energy, land, and supply and demand. Generally speaking, the cost of oxygen flames for ordinary work is around 10 to 100 yuan per cubic meter. If it is high-grade and special-purpose, the price or more.
For methyl ether and oxygen flames, its performance is also poor. For general work areas, the cost per cubic meter may be between 150 yuan and 250 yuan. If it is used in high-end technology, special industries such as manufacturing, etc., the cost requirements are severe, and the cost per cubic meter may exceed 300 yuan.
However, the market is uncertain, and the supply and demand, the waves of raw materials, and the policy and law can all be changed. Such as coal and other raw materials are inexpensive and inexpensive, and the oxygen flame may be reduced; in case of a special period, the demand will increase greatly and the supply will be insufficient, so it is necessary. Therefore, if you want to know the market, it is appropriate to contact the supplier and the city to obtain the latest and best quality.