The main use of triethanolamine, although it is not explicitly stated in "Tiangong Kaiwu", it can be explained by today's chemical knowledge and industrial use. Triethanolamine has many uses, mainly in the field of surfactants. In industry, it can make emulsifiers. Those who cover emulsifiers can make immiscible liquids, such as oil and water, uniformly mix into stable emulsions. Triethanolamine reacts with fatty acids to obtain fatty acid triethanolamine soap. This soap is often used as an emulsifier in cosmetics, textile printing and dyeing, leather and other industries. In cosmetics, it can help oil and water to mix, making the emulsion delicate and uniform in texture, improving the feeling and stability of application, and less irritating to the skin, so it is widely used in skin care and hair care products. Furthermore, triethanolamine has great uses in metalworking fluids. It can be used as an anti-rust agent and lubricant. In metal cutting, grinding and other processing processes, metalworking fluids need to have the functions of lubrication, cooling and anti-rust. Triethanolamine can be adsorbed on the metal surface to form a protective film, preventing the metal from contacting air and moisture, and achieving the effect of anti-rust. At the same time, it can reduce the friction between the metal and the tool, make the processing process smoother, improve the processing accuracy, and reduce tool wear. In addition, triethanolamine also plays an important role in cement grinding aids. In the cement grinding process, adding an appropriate amount of triethanolamine can change the surface properties of cement particles, prevent particle agglomeration, improve cement grinding efficiency, and reduce grinding energy consumption. And triethanolamine can promote the early hydration of cement, improve the early strength of cement, and make cement products meet the requirements of engineering construction progress faster. In addition, triethanolamine can be used as an absorber for desulfurization and carbon dioxide removal in the field of gas purification. Because of its alkalinity, it can chemically react with acidic gases, thereby removing impurities in the gas and improving gas purity. In the pharmaceutical, rubber and other industries, triethanolamine also has auxiliary functions, such as adjusting pH value and stabilizing product performance. Therefore, triethanolamine is widely used and plays an indispensable role in many industrial fields.

For triethanolamine, there are various physical reasons. Looking at its state, it is a colorless to light yellow viscous liquid at room temperature, odorless and hygroscopic, just like the state of agar pulp, sticky and positive. On its melting point, it is about 21 degrees. It melts when exposed to temperature, just like ice disappearing under the warm sun. The boiling point is quite high, up to 36.5 degrees. If you want to boil it and turn it into gas, you need to burn it with a hot topic to see its gas rise. Its density is about 1.127 grams per cubic centimeter, which is heavier than water. When placed in water, it is like a stone sinking into an abyss and sinking down by itself. And it can be miscible with water and alcohol at will, like a fish getting water, blending seamlessly, but it is difficult to dissolve with organic solvents such as ether and benzene, just like oil and water, self-separating. And it has its viscosity, which is quite considerable. It sticks like glue at room temperature and flows slowly. However, it can be used for mechanical lubrication, etc., which can slow down friction and guard, such as plaster on the device, so that it can run smoothly without damage. Furthermore, triethanolamine is alkaline and can be neutralized with acids, just like yin and yang, with harmony as the most precious. It can absorb acid gases such as carbon dioxide and hydrogen sulfide in the air, just like a sponge absorbing water, and has the power of purifying gases. It can be seen from the above that triethanolamine has a unique physical rationality and is widely used in chemical, pharmaceutical, daily use, and other industries. It can be used as an auxiliary agent or as a raw material, but it varies depending on its physical properties. It is a wonder in the world.

Sodium triacetoxy borohydride, the question of chemical characteristics, I will describe it in detail in ancient Chinese. This sodium triacetoxy borohydride is still stable in chemistry. However, its stability is not absolutely stable, and it must be dealt with according to the way. Looking at its structure, there is a combination of acetoxy group and sodium borohydride. Sodium borohydride has strong reducing properties, and the addition of acetoxy groups makes its reducing properties slightly slower, and also increases its stability. At room temperature, if there is no external disturbance, it can exist. However, if it encounters changes in water and fire, or combines with uncomfortable substances, it may change. It is often used as a reducing agent in the field of organic synthesis. In this process, although there is reductivity, the reaction can be slow and orderly due to the shielding of acetoxy groups. Its stability is better than that of sodium borohydride. Sodium borohydride is strong and will explode in contact with water, while sodium triacetoxy borohydride can be used in a slightly wider environment. However, if you want to keep it stable, there are also requirements. When avoiding moisture, store it in a dry place. If moisture invades it, it may gradually damage its quality. And it cannot be co-placed with strong oxidants. If the two meet, like dry wood and fire, it is easy to change violently. In summary, sodium triacetoxy borohydride, although more stable than other strong reducing agents, must abide by the rules of chemistry, observe its properties, and prevent its changes in order to obtain its benefits and avoid its harm. In organic synthesis, it can be used to its full potential and achieve its great success.

For sodium triacetoxyborohydride, when storing and transporting, pay attention to many matters. First storage method. This medicine should be placed in a cool, dry and well-ventilated place. Cover because of its active nature, if it is placed in a high temperature and humid place, it may deteriorate. And it needs to be kept away from fire and heat sources to prevent unexpected reactions. It should be stored separately from oxidants and acids, and must not be mixed. This is because of its chemical properties. If it encounters them, it may react violently and endanger safety. The storage place should also have suitable materials to contain leaks for emergencies. Times and transportation matters. Before transportation, be sure to ensure that the packaging is complete and sealed. Packaging materials must be able to resist vibration, collision and friction to avoid leakage of the drug. During transportation, follow the prescribed route and do not stop in densely populated areas and traffic arteries. Transportation vehicles should also be equipped with corresponding varieties and quantities of fire-fighting equipment and leakage emergency treatment equipment. And transportation personnel should be professionally trained, familiar with the dangerous characteristics of this drug and emergency disposal methods, drive cautiously on the way, and avoid violent operations such as sudden braking and sharp turns to prevent package damage and leakage of the drug. In addition, whether it is storage or transportation, relevant laws and standards must be strictly adhered to. From the location of storage sites, facilities, to the operation specifications of the transportation process, all must not be slack. Only in this way can we ensure the safety of sodium triacetoxyborohydride during storage and transportation, avoid accidents, and ensure the safety of personnel and the environment.

Sodium triacetoxy borohydride is an important reagent in organic synthesis. Its common synthesis methods are as follows: First, sodium borohydride and acetic anhydride are used as raw materials. First, take an appropriate amount of sodium borohydride and slowly add it to the reaction vessel containing acetic anhydride. This process needs to be carried out at low temperature and stirred, because sodium borohydride has high activity and the reaction is violent. Sodium borohydride reacts with acetic anhydride, and the hydrogen atoms in sodium borohydride are gradually replaced by acetoxy groups to form sodium triacetoxy borohydride. The reaction equation is roughly: $NaBH_ {4} + 3 (CH_ {3} CO) _ {2} O\ longrightarrow NaBH (OOCCH_ {3}) _ {3} + 3CH_ {3} COOH $. After the reaction is completed, after appropriate post-treatment, such as extraction, distillation, recrystallization, etc., pure triacetoxy sodium borohydride can be obtained. Second, potassium borohydride is used instead of sodium borohydride. Mix potassium borohydride and acetic anhydride in a certain proportion in a specific solvent, such as anhydrous ether or tetrahydrofuran. Under the protection of low temperature and inert gas, slow stirring prompts the reaction to occur. The reaction of potassium borohydride and acetic anhydride also produces triacetoxy potassium borohydride, which can be replaced by ion exchange and other means to obtain sodium triacetoxy sodium borohydride. The advantage of this method is that some properties of potassium borohydride are slightly different from sodium borohydride, and for specific reaction systems, it may show better reaction results. There are also those who use boric acid as the starting material. First, boric acid is reacted with acetic anhydride to form a derivative of acetoxyboric acid, and then it is reduced with suitable reducing agents, such as lithium aluminum hydride, etc., and finally triacetoxyborohydride can be obtained. Although this path is a little complicated, the raw material boric acid is relatively easy to obtain, and the intermediate product can be modified and regulated according to different needs to optimize the synthesis process and improve the purity and yield of the product. The above methods have their own advantages and disadvantages. In the actual synthesis, the appropriate synthesis method should be carefully selected according to the availability of raw materials, cost, reaction conditions and requirements for product purity.