[Chemical Knowledge]：The nature, use, upstream and downstream raw materials, storage methods, 17α-diol.

The Nature of Preference Diol

The glycol (chemical name: 1,2-cyclohexanediol, molecular formula C6H12O2) is a colorless, viscous liquid with a high boiling point and low volatility. Its molecular structure contains two hydroxyl groups, which makes it highly polar and hydrophilic. The glycol has good solubility in water and a variety of organic solvents, and the chemical properties are relatively stable, and it is not easy to oxidize. With high thermal stability and low toxicity, it is environmentally friendly and is a relatively safe chemical raw material.

Use of Tilol

The glycol is widely used in various chemical fields. It is an important monomer for the production of polymer materials and can be used to synthesize polyester, polyurethane and epoxy resins. The two hydroxyl groups of the diols can react with isocyanates to form polyurethane foams and elastomers, which are widely used in the construction, furniture and automotive industries. Glycols are used as intermediates in the pharmaceutical industry for the synthesis of a variety of drugs, such as antibacterial, antiviral and cardiovascular drugs. It is also used as a solvent, lubricant and antifreeze, etc., and has an important auxiliary role in industrial production.

The Upstream Raw Material

of the Glycol

The upstream raw materials for the production of the pyridol mainly include cyclohexane and oxygen. In industrial production, the oxidation reaction of cyclohexane is usually used to prepare a cyclopediol. The specific process includes the oxidation reaction of cyclohexane with oxygen under the action of a catalyst to produce cyclohexanone, and then further hydrogenation reduction to produce pyrediol. The choice of catalyst and the control of reaction conditions are the key factors affecting the yield and purity of the two. Commonly used catalysts include noble metal catalysts such as palladium and platinum. The reaction temperature is usually controlled at 150-200°C and the reaction pressure is between 0.1-1MPa.

The downstream products

of the glycol.

The downstream products of the glycol mainly include various polymer materials and fine chemical products. In particular, the glycols can be reacted with dibasic acids such as terephthalic acid to synthesize polyester resins for use in the manufacture of fibers, films and plastic articles. It reacts with diisocyanate to produce polyurethane foam, which can be used in the production of furniture, car seats and insulation materials. It can also be used to synthesize epoxy resins, which are widely used in the fields of coatings, adhesives and composite materials. Through chemical modification, it can also be converted into various pharmaceutical intermediates and pesticide raw drugs, further expanding its scope of application.

The storage method

of the glycol.

Because of its high boiling point and low volatility, it is relatively simple to store, but the following points still need to be paid attention. It should be stored in a cool, well-ventilated place, avoid direct sunlight and high temperature environment to prevent its decomposition or deterioration. The glycol should be stored in a well-sealed container to prevent moisture absorption and impurity contamination. The storage container should be made of corrosion-resistant materials, such as stainless steel or plastic products, to avoid contact with iron, copper and other metals to avoid adverse reactions. During storage and transportation, fire prevention and explosion prevention measures shall be taken to ensure safety.

The Market Prospects

With the advancement of industrialization and the enhancement of environmental awareness, the market demand for Pet Diol has increased year by year. Its application in the field of polymer materials such as polyester, polyurethane and epoxy resin is constantly expanding, especially in the construction, automobile and electronic and electrical industries, and the demand for the glycol is growing rapidly. The application of pyrethrodiol in the field of medicine and fine chemicals is also expanding. With the advancement of new drug research and development and pesticide innovation, the importance of pyrethrodiol as an intermediate has become increasingly prominent. The environmental protection characteristics of the glycol make it have advantages in replacing traditional chemical raw materials, and it has broad market prospects in the future.

Technical Challenges and Solutions

of the Production of Penediol

Although the application prospect of Penediol is promising, its production process still faces some technical challenges. The first is the reaction selectivity and yield. How to improve the selectivity and yield of cyclohexane oxidation and hydrogenation reaction is the key to improve the production efficiency of the glycol. To this end, new catalysts can be used and reaction conditions can be optimized, such as the development of highly efficient palladium-based catalysts and the optimization of reaction temperature and pressure. Secondly, the energy consumption and cost in the purification process can be improved by improving the separation technology, such as the use of efficient distillation and crystallization methods, to reduce energy consumption and cost, improve product purity and yield.

The Environmental Protection and Safety of Penediol

The alcohol has certain advantages in environmental protection and safety. The toxicity of the glycol is low, and the harm to the environment and human body is small. Under normal conditions of use and handling, the diols will not cause serious pollution to the environment. The high boiling point and low volatility of the glycol make it relatively safe during storage and transportation, and there are fewer leakage and combustion accidents. In the process of production and use, it is still necessary to pay attention to preventive measures to avoid large-scale leakage and operation in high temperature environment to ensure safe production.

The Future Development Trend

of Preference Diol

In the future, the production and application of PMD will develop in the direction of high efficiency, green and diversification. With the progress of catalyst and reaction technology, the production efficiency and quality of Pnediol will continue to improve. The increasingly stringent environmental regulations and the diversification of market demand will promote the application of the glycol in more fields, such as degradable plastics, bio-based materials and new energy. The progress of molecular design and chemical modification technology of the glycol will further expand its application in high value-added products and enhance its market competitiveness.

As an important chemical raw material, it has broad application prospects and market potential. Through continuous technological innovation and process optimization, the production and application of Pl will usher in a brighter future.