2,4-pyridinediol

2% 2C4 - diol was widely used in ancient times, and it was reflected in many fields involved in "Tiangong Kaiwu". The main uses are as follows:
First, in the textile dyeing industry, 2% 2C4 - diol plays a key role. Ancient dyers were well aware of its characteristics and used it to make the dye adhere more evenly to the fabric fibers. For example, when dyeing silk, soaking silk in a dye solution with 2% 2C4 - diol added to it can promote better penetration of the dye, so that the dyed silk is not only bright and bright, but also not easy to fade after long-term use or washing. Like many silk workshops in Suzhou and Hangzhou, with the ingenious use of 2% 2C4-diol, the silk products produced are exquisite, selling well at home and abroad, and becoming one of the important commodities in ancient China's foreign trade.
Second, in the ink making process, 2% 2C4-diol is indispensable. Ink making requires fine grinding and uniform mixing of the ink. In this process, 2% 2C4-diol is used as an additive to enhance the viscosity and toughness of the ink. Ancient ink makers strictly controlled the amount of 2% 2C4-diol when making high-quality ink ingots. After adding an appropriate amount of this substance, the quality of the ink ingots made is tight, the ink is smooth when writing, and the ink color does not fade for a long time. For example, Huimo is famous for its characteristics of "light, grinding, smelling, strong as jade, silent, a little like paint, and ten thousand years of truth". 2% 2C4-diol is also useful in it.
Third, in the processing of some specific drugs, 2% 2C4-diol is also useful. Ancient doctors found that adding 2% 2C4-diol when processing some medicinal materials can change the medicinal properties of medicinal materials or enhance their efficacy. For example, when processing some medicinal materials that need to enhance their moisturizing effect, using 2% 2C4-diol can make the medicinal materials better absorb other auxiliary drug ingredients, thereby improving the overall efficacy and providing more effective drugs for the treatment of patients.

2% 2C4 - to its diol, is a genus of organic compounds. Its physical properties are quite characteristic, detailed as follows:
First, under room temperature and pressure, this material is mostly colorless and transparent liquid, clear in appearance, no variegation, no turbidity, just like clear water, with a sense of purity.
Second, in terms of smell, 2% 2C4 - to its diol often has a slight and special smell, not pungent and unpleasant smell, but also different from odorless things, under the smell, its unique smell can be felt.
Third, the solubility is very considerable. It shows good solubility in water, and the two can be blended seamlessly, just like water and milk. And in many organic solvents, such as ethanol, ether, etc., it can also be dissolved, which makes it widely used in many chemical reactions and industrial processes.
Fourth, high boiling point. This property allows it to boil and transform into a gaseous state at a relatively high temperature. This property allows it to maintain a stable liquid state in some reactions or operations that require a higher temperature environment, providing a stable reaction medium for related processes.
Fifth, the melting point is relatively low. It is easy to maintain a liquid state at room temperature, and does not require harsh temperature conditions to maintain its flow state. It brings many conveniences for practical use. Whether it is storage or transportation, it does not require special low-temperature equipment to maintain its liquid form.
Sixth, the density is similar to that of water. This characteristic makes the distribution and mixing more uniform in the system involving the participation of water, without too much consideration of complex problems such as stratification caused by excessive density differences, and simplifies many processes in practical operation and application.

2% 2C4 - The diol to it is an organic compound with various chemical properties.
First, it has the general properties of alcohols. Because it contains hydroxyl groups (-OH), it can react with active metals such as sodium (Na) to generate sodium alcohol and hydrogen gas. The reaction formula is as follows: 2HOCH ² CH ² OH + 2Na → 2NaOCH ² CH ² OH + H ³ ↑. This reaction is like a warrior holding a sword to break down the barrier. The sodium atom bravely replaces the hydrogen atom in the hydroxyl group, and the hydrogen gas rises like a victory signal.
Second, esterification can occur. When encountering carboxylic acids, under the catalysis of concentrated sulfuric acid and heating conditions, the hydroxyl and carboxyl groups will remove a molecule of water and form esters. If it reacts with acetic acid (CH
COOH), concentrated sulfuric acid acts as a medium, and heating prompts the combination of the two to form ethylene diacetate and water. The reaction formula is: HOCH < unk > CH < unk > OH + 2CH < unk > COOH $\ underset {\ triangle} {\ overset {concentrated sulfuric acid }{=\!=\!=}}$ CH <
Third, dehydration can occur. Under different conditions, it can be dehydrated intramolecular to form ethylene oxide, or intermolecular to form polyethylene glycol. Intramolecular dehydration is like a strong man breaking his wrist, removing a molecule of water to form a ternary ring of ethylene oxide; intermolecular dehydration is like everyone working together, many ethylene glycol molecules are connected to form chains to form polyethylene glycol.
Fourth, flammable. 2% 2C4 - to its diol is flammable. When oxygen is sufficient, it is completely burned to generate carbon dioxide and water. The reaction is violent and releases a lot of heat, which lays the foundation for it to be used as a fuel or participate in the combustion reaction. The reaction formula is: HOCH < unk > CH < unk > OH + 3O < unk > $\ overset {ignite }{=\!=\!=}$ 2CO < unk > + 4H < unk > O, like a phoenix bathing in fire, glowing with dazzling light. Its chemical properties are rich and diverse, and it has important uses in many fields such as organic synthesis and material preparation.

2% 2C4 - There are many synthesis methods for its diol, each with its own advantages and disadvantages, and the choice of method depends on the specific situation.
One is to use halogenated hydrocarbons as the starting material. The halogenated hydrocarbons and alkoxides can be reacted under suitable conditions and replaced by nucleophiles to form the target diol. This way, the raw materials are easy to find, and the reaction conditions are relatively mild, but side reactions may be difficult to avoid, and the yield may be limited. If halogenated ethane is reacted with sodium alcohol, and the reaction temperature and time are carefully adjusted, the corresponding diol can be obtained. However, the activity difference of halogenated hydrocarbons has a great impact on the reaction. Although the reaction of highly active halogenated hydrocarbons is fast, it is easy to cause side reactions; those with low activity require more intense conditions, or damage the product structure.
The second is the olefin oxidation method. Olefins can be directly oxidized by appropriate oxidants to obtain diols. Commonly used oxidants such as potassium permanganate, osmium tetroxide, etc. Potassium permanganate oxidizes olefins, which is easy to operate and cheap as a raw material, but its oxidation is strong, its selectivity is poor, or it causes excessive oxidation. Osmium tetroxide has excellent selectivity and high product purity, but it is highly toxic and expensive, and its use is limited. Taking ethylene as an example, it can be efficiently converted into ethylene glycol through specific oxidation steps. This process requires strict control of the pH and temperature of the reaction system. If there is a little carelessness, the yield and purity of the product will be affected.
Furthermore, the reduction method of alaldehyde or ketone can also be feasible. Alaldehyde and ketone can be treated with reducing reagents to form diols. Such as sodium borohydride, lithium aluminum hydride and other reagents. Sodium borohydride is mild and safe to operate. It is suitable for reduction of a variety of alcaldes and ketones, but its reduction ability is slightly weaker. Lithium aluminum hydride has strong reduction power and can handle substrates with high spatial resistance, but it requires an anhydrous and anaerobic environment, and the operation is complicated and dangerous. Using acetone as raw material, specific diols can be obtained through reduction steps. This process requires high precision control of the amount of reducing reagents and reaction time to achieve the best reaction effect.

In today's world, the price of 2,4-diacid in the market is about fifty yuan to one hundred yuan per kilogram. This price is not constant and changes with various conditions.
Looking at the trend of supply and demand, if there are many people who need this thing, but there are few people who produce it, the price will increase; on the contrary, if there are many people who produce it, but there are few people who want it, the price will be reduced. If all industries are prosperous, it is necessary to use 2,4-diacid, and the demand exceeds the supply, and the price will rise.
Also, the price of raw materials also has an impact. 2,4 - The production of diacids requires all kinds of raw materials. If the price of raw materials increases, the manufacturing cost will increase, and the market price will also increase accordingly. If the price of raw materials decreases, the cost will decrease, and the price may also decrease.
Furthermore, decrees and regulations, natural and man-made disasters are also related to their price. If the government issues new regulations, the production, sales, or production costs of this product will change, and the price will also change accordingly. If the place of origin encounters disasters and the production system is blocked, the supply will be small and the price will rise; if the four seas rise, the production system will be smooth, and the supply will be sufficient, the price will be stable. < Br >
is based on the market price of 2,4-diacid, which fluctuates between 50 and 100 yuan per kilogram due to supply and demand, raw materials, decrees, disasters, etc. The industry should consider the situation to respond to changes in market conditions.