2-chloropyridine

In the field covered by "Tiangong Kaiwu", the main use of 2-alkoxy groups is related to many processes and industries.
In the art of oil production, 2-alkoxy groups can play a key role in the refining process of grease. It can help adjust the physical and chemical properties of grease, improve the quality and stability of grease. In ancient times, grease was mostly used for lighting, cooking and lubrication of some simple machinery. 2-alkoxy groups can participate in chemical reactions, remove impurities in grease, improve the color and odor of grease, and make it more suitable for these purposes.
In the art of fabric printing and dyeing, 2-alkoxy groups are also indispensable. It can be used as an auxiliary agent to enhance the affinity between the dye and the fabric fibers, so that the dye adheres more evenly and firmly to the fabric. In this way, the printed and dyed fabrics are more vivid, long-lasting, and the pattern is clearer. This was of great significance to the textile industry at that time, and enhanced the aesthetic and practical value of the fabric. Whether it is daily wear cloth, or silk and other fabrics used for decoration and ceremonial occasions, the quality can be improved after this treatment.
In the leather industry, 2-alkoxy can be used in the tanning process of leather. It can interact with the protein fibers in leather to enhance the flexibility, wear resistance and water resistance of leather. The treated leather can be made into all kinds of leather goods, such as leather armor, leather boots, leather bags, etc., which are both strong and durable, and can resist the erosion of the natural environment, meeting people's needs in military, life and other aspects.
In the technology of papermaking, 2-alkoxy can be used in the sizing process of paper. It can form a protective film on the surface of the paper to improve the water resistance and strength of the paper. The paper produced in this way, whether used for writing, printing, or recording important documents, can be better preserved, and is not easily damaged by moisture and wear. It is of great significance to the inheritance and dissemination of culture. From the above, it can be seen that 2-alkoxy groups have important uses in many traditional processes described in Tiangong Kaiwu, which played a positive role in promoting the development of production, life and culture at that time.

What is the rationality of 2-% oxygen? Oxygen is the most common chemical substance, and its physical properties are the same as those described by you.
First of all, the color and taste of oxygen are all the color and taste of oxygen.
The second time its density is small, and the density is the worst among them. Each lift-up weighs 1.29 grams, and each liter weighs 0.089 grams. It is often used to fill the ball with oxygen so that it can rise in the air. The density of oxygen is slightly higher than that of air, weighing 1.443 grams per liter. This property also gives it a specific distribution in air.
Furthermore, the solubility of oxygen is not very good, and it is soluble in water. Oxygen is slightly soluble in water, but it is also not easily soluble. The oxygen dissolved in water is essential for aquatic organisms to breathe.
It also melts at minus 259-2 degrees Celsius, and boils at minus 256-8 degrees Celsius. Oxygen melts at minus 218-4 degrees Celsius, and boils at minus 183 degrees Celsius. Both meltdowns are low, and need to be reduced to cold temperatures in order to make it from liquid to solid.
As mentioned above, 2-% oxygen has its own unique physical properties, which do not determine its existence in nature, and also play an important role in many fields. In terms of chemical research, industrial production, and biological survival, it cannot be ignored.

Mercury is very different from ordinary things. Its quality is soft and flowing, and at room temperature, it is liquid and shiny, like the melting of silver, so it was also known as "flowing beads" in ancient times.
The melting point of mercury is very low, only -38.87 ° C, and the boiling point is only 356.6 ° C. Such physical properties make mercury unique in the ordinary environment, in a liquid state, which is very different from the solid state of other metals. Its density is quite high, about thirteen times that of water. When it is filled with utensils, it feels that its sinking is abnormal.
In terms of its chemistry, mercury is active and has a unique reaction. It can combine with many metal phases to form amalgam. Mercury amalgam has specific properties and often has good ductility and plasticity. The ancient gilding process relied on mercury amalgam.
Mercury is relatively stable in the air at room temperature, but when heated, it is easy to combine with oxidation to form mercury oxide. This mercury oxide is red in color, which is very different from the primary color of mercury. Mercury can also combine with sulfur phase, and when the two meet, they react quickly to form mercury sulfide. Mercury sulfide is vermilion in color, stable and bright in quality. It is a commonly used pigment and raw material for ancient paintings, medicinal pills, etc.
Although mercury has unique properties, its toxicity should not be underestimated. Mercury vapor inhaled into the human body, or mercury and its compounds invaded the mouth and skin, can cause poisoning, damaging the nervous system, digestion, urinary and other systems. The ancients used mercury as a raw material for alchemy, and many alchemists were poisoned due to long-term exposure to mercury. This is also evidence of mercury toxicity.
Because of the chemical properties of mercury, it is lively and complex, and it has both practical ability and hidden danger of poison. Those who use it should be cautious.

2-% is similar to its synthesis method. It can be obtained by hydrolysis, which is a common method. With direct flow through water, the water will decompose and produce oxygen, produce oxygen, and generate oxygen. Its transformation equation is:\ (2H_ {2} O\ stackrel {}{=\!=\!=} 2H_ {2}\ uparrow + O_ {2}\ uparrow\).
There is also a method of reforming with fossil fuels. For example, natural reforming, using natural water (the main component is methane\ (CH_ {4}\)) to steam water under the action of high temperature and catalysis. Inverse formula\ (CH_ {4} + H_ {2} O\ stackrel {catalytic, high }{=\!=\!=} CO + 3H_ {2}\), the generated carbon monoxide can be evaporated in one step,\ (CO + H_ {2} O\ stackrel {catalytic }{=\!=\!=} CO_ {2} + H_ {2}\), and more.
There is also a method of gold acid inverse. For example, dilute sulfuric acid inverse, the equation\ (Zn + H_ {2} SO_ {4 } =\!=\! = ZnSO_ {4} + H_ {2}\ uparrow\). This method is often used to extract a small amount of water in the laboratory.
There are other biological methods. Some microorganisms, such as photosynthetic bacteria and oxygenated bacteria, can be produced by their own substitution under specific conditions. This method is environment-friendly and renewable, but it is still in the research and development stage, and has not yet been used for large-scale molding.

Safety is of paramount importance to those who should pay attention during the process of storage. Because of its flammability, it will explode in case of open fire or high temperature, so the storage area is well connected, and no fire is prohibited. It should be placed in a low-temperature area, and it should be placed in an empty area. If there is a leak, it can quickly escape, and it is less likely to be exploded. The storage container is also very important. It must be of high quality and durability, and it should be checked regularly to prevent leakage.
It should not be slack. It should be equipped with fire-fighting equipment and emergency management of leakage. On the way, the company must be careful to avoid densely populated places and fire sources. If there are special road sections such as beams and tunnels on the way, you should be extra careful. Unload it, make it difficult to avoid collisions, dragging, and prevent the container from being damaged.
Furthermore, if it is not stored or not, all the people who work hard are familiar with the characteristics, hazards, and emergency management methods. Daily operations should be carried out in accordance with the rules, and no mistakes should be made. In this way, it is possible to ensure the safety of the two.