1,3-Dichloro-2-Iodobenzene

1% 2C3 + - + dioxy + - + 2 + - + The main use of rice is multi-terminal. According to the "Tiangong", there are two important reasons for the use of rice.
First, the son of Li can make a refreshing solution to the heat. The method is to take the rice seeds, wrap them in a cloth, soak them in water, and rub them upside down to make them separate from the water. The water is thick and condensed, like fat, the food is clear and sweet, and the heat is hot, it can eliminate thirst and relieve heat, and the people are the best in the heat.
Second, the vines of Li have good quality. The ancients often took their vines and processed them into a solution. In life, it can be used to tie up objects or to build easy-to-use frames. It has its own uses in many aspects such as engineering, construction, etc. Its rattan is durable and durable, can bear a certain weight, and provides much convenience for the ancient people's life.
Of course, it can be used for the use of its sons, or its rattan is used for the life of the ancients. It is a precious source of nature for people. It plays an important role in daily needs and people's livelihood.

"Tiangong Kaiwu" is a comprehensive work on agricultural and handicraft production in ancient our country. It contains a wide variety of substances. Today, the physical properties of saltpeter are mentioned.
Saltpeter, also known as nitrate flame, potassium saltpeter, etc. Its color is mostly colorless, white or gray crystalline, and its appearance is crystal clear, like ice crystals, or white powder, delicate and uniform. The texture is more brittle, and it feels smooth to the touch.
Saltpeter has the characteristics of being easily soluble in water. When placed in water, it melts and dissolves in a moment, just like ice and snow melt when warm. When dissolved, the water temperature will decrease slightly, which is the appearance of heat absorption.
Its melting point is relatively low, and under a certain heat, it turns into a liquid. And saltpeter is chemically active, especially outstanding, which is the ability to support combustion. In case of an open flame, it can make the fire rise rapidly, just like adding wings to the flame. When burning, it is often accompanied by a special flame color, which is quite strange.
In addition, the density of saltpeter is slightly lighter than that of ordinary rocks, and it feels light in the hand. In ancient times, due to its unique physical properties, it played a key role in alchemy, gunpowder production, and the processing of certain medicines, becoming an indispensable raw material for many skills.

1% 2C3 - Carbon Dioxide - 2 - The chemical properties of borax are determined. This is to explore the qualitative properties of borax in the context of carbon dioxide. Borax, its chemical formula is Na ³ [B O (OH) ] · 8H ² O, often a white crystalline powder.
The chemical properties of borax are unique. Under normal conditions, borax is determined. However, in case of carbon dioxide, it is necessary to have an environment. If in the tidal environment, carbon dioxide dissolves in water to form carbonic acid, the acidity of carbonic acid is weak, then borax can be reacted. Borax hydrolysis produces borate radicals, and the effect of carbonic acid can change the shape of borax.
However, in the dry environment, carbon dioxide can be directly reacted by borax, and borax can maintain its chemical properties. Because carbon dioxide needs a medium of water to develop its acidity, and borax can be reacted.
Therefore, the chemical properties of borax in the presence of carbon dioxide are determined, depending on factors such as the degree of resistance in the environment. In the tidal environment, borax may be modified by the reaction of carbon dioxide and water; in the dry environment, borax can maintain its chemical properties.

To make 1% 2,3-dioxo-2-naphthol, the method of synthesis needs to be carried out in the ancient way. This step is complicated and needs to be done in sequence.
First, choose the right raw materials. To obtain pure 2,3-dioxo-2-naphthol, naphthol and other auxiliary reagents need to be prepared. Naphthol needs to be selected with pure texture, and less impurities are conducive to subsequent reactions. Auxiliary reagents such as oxidizing agents, etc., also need to be accurately measured according to the needs of the reaction.
times, to control the reaction environment. In a special vessel, put naphthol and dissolve it in warm water to disperse it evenly. Gradually enter the oxidizing agent. At this time, the temperature and rate need to be strictly controlled. If the temperature is too high, the reaction will be excessive, and the product will be easily destroyed; if the temperature is too low, the reaction will be slow, which is time-consuming and energy-consuming. The rate also needs to be moderate. If it is too fast, the system will be unstable, and if it is too slow, it will affect the efficiency.
Furthermore, adjust the reaction agent. During the reaction, adjust the pH according to the real-time state. Or add an appropriate amount of acid, or add some alkali to make the reaction go in a favorable direction. This step requires fine operation, measured with test paper or professional instruments, to maintain the pH appropriately.
Repeat, when the reaction is completed, the separation and purification technique is required. By filtration, extraction, distillation and other methods, impurities are removed to obtain a pure product. Filtration can remove insoluble substances, extraction can be divided into different phases of substances, and distillation can improve the purity of the product according to the difference in boiling point.
At the end, check the quality of the product. Observe its color, smell its taste, and measure its melting point, purity and other parameters with professional equipment to ensure that it is combined with the standard of 1% 2,3-dioxo-2-naphthol. In this way, a qualified product can be obtained to form this synthesis method.

The storage and transportation of charcoal is related to all things, so you should pay careful attention.
When storing charcoal, the first thing to pay attention to is the ground. It is necessary to choose a high dry place to avoid low humidity. If the place is wet, the charcoal is prone to moisture. When the charcoal is damp, its quality changes, it does not burn vigorously, and there is a lot of smoke, which is not good for use. Therefore, the place where the charcoal is stored must be dry, and it can be set up on a platform, several inches off the ground, so that the moisture is difficult to invade.
Furthermore, the place where the charcoal is stored should be ventilated. Although the charcoal is a material, it also needs breath circulation. If it is closed in the stifling, the air is not smooth, and the charcoal or rotten gas will damage its performance. Ventilation can keep the charcoal fresh
As for transporting charcoal, it should be protected from bumps when traveling on the road. The charcoal is brittle and cannot withstand excessive vibration. If the driving is bumpy and violent, the charcoal is easy to break. The use of broken charcoal may not be as convenient as the whole charcoal, which also affects the fuel efficiency. It is a car that transports charcoal. It should be driven slowly and steadily to avoid potholes and rough roads.
When transporting charcoal, it should also be protected from wind and rain. In case of rain, the charcoal is drenched, and it is wet as if it is hidden in the wet. If it is windy, the charcoal dust is easy to be blown away and its weight is lost. Therefore, the transportation of charcoal needs to be covered with a cloth to ensure that the wind and rain do not invade.
All these kinds of Pay attention to all things, so that the charcoal can always maintain its quality, useful for use, and not wrong.