[Chemical Knowledge]：The nature, use, upstream and downstream raw materials, storage methods of n-propyl acetate, is n-propyl acetate a hazardous chemical?

PROPERTIES OF n-PROPYL ACETATE

n-propyl acetate, chemical formula is C5H10O2, molecular weight of 102.13g/mol, is a colorless transparent liquid. It has a sweet, fragrant odor similar to bananas, a boiling point of 101-102°C, a density of 0.886g/cm³(20°C), a refractive index of 1.392-394, and a vapor pressure of 19 mmHg(20°C). N-propyl acetate has good solubility, can be miscible with ethanol, ether and other organic solvents, but the solubility in water is small. It has a flash point of 14°C and has a certain degree of flammability, which requires special attention during use and storage.

Use of n-propyl acetate

N-propyl acetate is widely used in industrial production. It is an important solvent that is often used in paints, inks, coatings and cleaners. Because of its good solubility and volatility, it contributes to the uniform distribution and rapid drying of the coating. n-Propyl acetate, as a perfume ingredient, is widely used in food, cosmetics and daily necessities to increase the aroma of products. It is also used as an extractant and drug intermediate in the pharmaceutical industry, and is involved in the synthesis of many drugs.

n-Propyl acetate upstream feedstock

The production of n-propyl acetate relies primarily on several key upstream feedstocks, including n-propanol and acetic acid. n-Propanol (C3H8O) is a colorless liquid produced mainly by the hydrogenation of olefins in the petrochemical industry or by the hydration of propylene. Acetic acid (C2H4O2), also known as acetic acid, is mainly produced by ethylene oxidation or ethanol fermentation. Through the esterification reaction, n-propyl alcohol and acetic acid are heated to generate n-propyl acetate and water under the action of a catalyst (such as sulfuric acid). The reaction is as follows:

[\text{C3H8O C2H4O2 → C5H10O2 H2O}]

n-Propyl acetate downstream products

As an intermediate, n-propyl acetate can be further processed to generate other chemical products. For example, in the synthesis of spices, it can react with other chemicals to produce various flavors and fragrances, which are used in food, beverages, cosmetics and daily necessities. In the pharmaceutical industry, n-propyl acetate can be used as an intermediate in the production of certain drugs, participate in complex organic synthesis processes, and finally generate pharmaceutical compounds with therapeutic effects.

Storage method of n-propyl acetate

Storage of n-propyl acetate requires special attention to its flammability and volatility. Should be stored in a cool, dry, well-ventilated place, away from fire and heat sources. The storage container shall be a sealed special container, such as a steel or aluminum drum, protected from direct sunlight and high temperature environment. In order to prevent accidental leakage or explosion accidents, the storage area should be equipped with corresponding fire protection and ventilation equipment, and the tightness of the container should be checked regularly. During storage and transportation, relevant safety regulations and standards must be strictly observed to ensure the safety of operators and environmental protection.

Safety and Environmental Precautions

When handling n-propyl acetate, it is necessary to take appropriate protective measures, such as wearing gloves, goggles and protective clothing to prevent skin contact and eye splash. The workplace should have good ventilation conditions to avoid inhalation of its vapors. In the event of a leak, measures should be taken promptly to deal with it to prevent it from spreading to water or soil to avoid pollution to the environment. Waste disposal should comply with local environmental regulations, safe recycling and disposal, to prevent long-term adverse effects on the ecological environment.

Market Prospects and Trends

With the continuous development of industry and consumer goods market, the demand for n-propyl acetate shows a growing trend. Especially in the fields of coatings, inks and spices, the market demand for n-propyl acetate is growing steadily because of its excellent performance and wide application prospects. In the future, with the advancement of green chemical industry and environmental protection regulations, the production and application of n-propyl acetate will pay more attention to environmentally friendly and sustainable development, which also provides new opportunities and challenges for the industry's technological innovation and market expansion.

Conclusion

As an important chemical product, n-propyl acetate has good solubility and aroma, and is widely used in coatings, inks, spices and pharmaceuticals. Its production relies on n-propanol and acetic acid, produced by esterification. During storage and use, it is necessary to pay attention to its flammability and volatility, and take appropriate protective measures and storage conditions to ensure safety and environmental protection. With the growth of market demand and the improvement of environmental protection requirements, the production and application of n-propyl acetate will usher in new development opportunities.