Quinoline-8-boronic acid

Borax has many main uses. In the way of alchemy and pharmacy, borax is very important. The ancient alchemists used borax as a medicine to help the formation of medicinal pills. Due to the unique chemical properties of borax, it can help other substances fuse under high temperature, so that the ingredients of medicinal pills are uniform and the quality is good.
In metallurgy, borax is also very useful. When melting metals, adding borax can remove metal impurities. Borax combines with impurities and floats on the liquid metal, which is easy to skim and improve the purity of the metal. Therefore, casting swords and forging iron rely on the power of borax, and the utensils made are tough and sharp.
In the method of anti-corrosion and preservation, borax also shows its ability. In the past, borax was often used to preserve food. Borax can inhibit the growth of microorganisms, so that food can be stored for a long time. It is suitable for use, but too much is harmful.
In the printing and dyeing of textiles, borax is also indispensable. When dyeing and coloring, borax can help the dye to spread evenly on the fabric, resulting in a bright and long-lasting color. The fabric is treated with borax, which is more shiny and has a high texture.
In the art of ceramic firing, borax has an extraordinary effect. It can reduce the melting point of ceramics, save the ability of firing, and make the ceramic dense and smooth. Borax is added to the glaze, and the burnt color is gorgeous and beautiful.
To sum up, borax is a key item in alchemy, metallurgy, anti-corrosion, printing and dyeing, ceramics, and other fields. The ancients skillfully used borax to achieve many exquisite skills, leaving a valuable wealth of experience for future generations.

Borax is also a crystalline mineral of sodium tetraborate pentahydrate. Its physical properties are quite unique and have the following characteristics.
Looking at its shape, it is often a block or granular aggregate. The crystals are mostly plate-shaped or columnar, and occasionally complete crystal shapes are seen, but they are relatively rare. They are mostly produced in blocks and have a denser texture.
When it comes to color, pure borax is often colorless and transparent, just like crystal clear ice. However, due to impurities, white, light gray, light yellow, light blue, light green and other colors can also be seen, just like the carefully smudged hands of nature.
The luster of borax, with a glass texture, shines brightly under the light, as if the stars are falling.
Its hardness is low, the Mohs hardness is about 2-2.5, and the fingernails can leave marks on its surface.
The cleavage of borax is complete, it can be easily split along a specific direction, and the section is smooth and bright. Its density is about 1.69-1.72 g/cm ³. Compared with many common minerals, the density is relatively small, and it feels light in the hand.
In terms of solubility, borax is easily soluble in water, and gradually dissolves in contact with water. Its aqueous solution is weakly alkaline. When heated, borax will gradually lose its crystalline water, and then melt into a transparent glassy substance. This property makes it used in many fields, such as metallurgy, chemical industry, medicine and other industries.
The physical properties of borax are its unique characteristics, which play an important role in the process of human understanding and utilization of nature.

The chemical synthesis method of borax in "Tiangong Kaiwu" has existed in ancient times, but the process is complicated, and each method has its own subtlety. Today, it is described in detail as follows.
First, boromagnetite is the starting material. Boromagnetite is co-heated with soda ash, and the chemical reaction formula is: $2MgO\ cdot B_ {2} O_ {3} + Na_ {2} CO_ {3}\ xlongequal {high temperature} 2NaBO_ {2} + 2MgO + CO_ {2}\ uparrow $. The resulting sodium borate is combined with sulfuric acid to obtain boric acid, that is, $2NaBO_ {2} + H_ {2} SO_ {4} + 5H_ {2} O = Na_ {2} SO_ {4} + 2H_ {3} BO_ {3}\ cdot H_ {2} O $. Boric acid is heated and loses water to obtain borax, $4H_ {3} BO_ {3}\ xlongequal {heating} H_ {2} B_ {4} O_ {7} + 5H_ {2} O $, $H_ {2} B_ {4} O_ {7} + Na_ {2} CO_ {3}\ xlongequal {heating} Na_ {2} B_ {4} O_ {7} + CO_ {2}\ uparrow + H_ {2} O $.
Second, borax ore is based. The ore is first crushed, ground, and then leached with water to dissolve the borax. The leaching solution is settled and filtered to remove impurities to obtain a purer borax solution. After evaporation, concentration, cooling and crystallization, borax is precipitated from the solution. This is a physical separation and purification method, and borax can also be obtained.
Third, boric acid and sodium hydroxide are used as raw materials. The two are mixed in a certain proportion to undergo a neutralization reaction, $H_ {3} BO_ {3} + NaOH = NaBO_ {2} + 2H_ {2} O $. The obtained sodium borate solution is reacted with boric acid, and reacted with boric acid at an appropriate temperature and time to obtain borax, $4H_ {3} BO_ {3} + 2NaBO_ {2} = Na_ {2} B_ {4} O_ {7} + 7H_ {2} O $.
The above methods have their own advantages and disadvantages. With boron-magnesium ore as raw material, although the raw material is easy to obtain, the reaction conditions are harsh, high temperature is required, and energy consumption is quite large; with borax ore water leaching method, the process is relatively simple, but the ore purity requirements are higher, and the product purity improvement requires multiple steps to remove impurities; boric acid and sodium hydroxide synthesis method, the reaction conditions are mild, the product purity is easy to control, and the raw material cost may be higher. Workers should follow the actual situation, such as the difficulty of obtaining raw materials, cost considerations, product purity requirements, etc., to achieve the best environment of borax synthesis.

Borax needs a lot of attention during storage and transportation.
Storage of borax requires the drying of the first environment. Borax has certain hygroscopicity. If the storage environment is humid, it is easy to cause moisture and agglomeration, which affects the quality and subsequent use. Therefore, choose a dry and ventilated storage place, away from water sources and moisture, and the floor of the warehouse should be raised to prevent the ground from returning moisture and invading the borax.
Furthermore, temperature is also the key. Borax may undergo chemical changes in high temperature environments, causing its properties to change. The temperature of the storage place should be moderate, not too high, and direct sunlight should be avoided to prevent the damage of borax due to light heating.
As for the transportation of borax, the packaging must be solid and stable. Because it is a chemical substance, if the packaging is damaged, it may not only cause the borax to spill and wear, but also may cause harm to the transportation personnel and the surrounding environment. The packaging materials used must be able to withstand certain external impact and friction to ensure that the packaging is intact during transportation.
At the same time, the transportation process should avoid mixing with other chemical substances. Borax may react chemically with certain substances, causing safety accidents. Therefore, it should be transported separately, and the transportation vehicle must also be kept clean, without other chemicals that may react with it.
During transportation, you should also pay attention to the climate and road conditions. In case of bad weather, such as heavy rain, high temperature, etc., corresponding protective measures should be taken. In case of bumpy road conditions, ensure that the borax packaging is not damaged by violent vibration. In this way, the quality and safety of borax can be fully protected during storage and transportation.

The price of boric acid in Guanfu City, Fang Guang-8-Boric Acid, is really what everyone is concerned about. Examine it carefully today, but the market price often varies due to changes in time, place, and supply and demand.
In all prosperous commercial ports, if there are abundant materials and merchants compete for sales, the price may tend to be easy. When the supply of goods is abundant, and the user is not in a hurry, the price of boric acid may be in various relatively low-cost domains, with each catty or just a few dollars of silver.
However, when the weather is not smooth, the production area is damaged, resulting in a lack of supply, and when there are many people in need in the city, the supply exceeds the demand, the price must rise. At that time, merchants were eager to stock up on goods, and they were waiting for the price to be sold. The price of boric acid may suddenly increase to two silver per catty, which is also unknown.
And in different places, the price also varies. The capital is large, the transportation is convenient, and the goods in the four directions converge. The price of boric acid may be slightly flat due to competition. And in remote towns, it is difficult to reach by boat and car, and the goods are scarce and those who seek are not reduced. The price is often higher than that in cities.
Also, the market conditions are fickle, the calculations of merchants, and the passage of the current situation are all closely related to the price. Therefore, it is difficult to know the scope of the market price of boric acid in a word. Roughly speaking, when it is easy, a few dollars can buy a catty; when it is in short supply, a few silver is not an empty price. The market is diverse, and only those who judge the situation can know its approximate price.