Butyl acetate

Butyl acetate, chemically known as butyl acetate, is one of the organic compounds. It has many characteristics and wide application, and the production process is also unique.

1. Application
Butyl acetate plays a key role in many fields. In the coating industry, it is an important solvent. Because it can effectively dissolve a variety of resins, such as nitrocellulose, epoxy resins, etc., it allows the coating to spread evenly during construction to form a flat and smooth coating film, which is widely used in various paint products such as automotive paint and furniture paint. In the ink industry, butyl acetate, with its good solubility, can fully disperse the pigments and resins in the ink, ensure the printability of the ink, make the printing pattern clear and bright, and is often used in offset printing inks, gravure printing inks, etc. In addition, in the fragrance industry, butyl acetate has a pleasant fruit aroma, and is often used as a fragrance component to prepare banana, pear and other scented edible flavors, and is also used in the fragrance formula of daily chemical products such as perfumes to add a unique fragrance. In the pharmaceutical industry, it is used as a solvent in the synthesis and extraction process of drugs to help dissolve and separate drug components, and improve the purity and quality of drugs.

Second, properties
From the perspective of physical properties, butyl acetate is a colorless and transparent liquid, with a low boiling point, about 126.1 ° C, and good volatility. Its density is smaller than that of water, 0.8825g/cm ³, which is difficult to dissolve in water, but it can be miscible with most organic solvents such as ethanol and ether. In terms of chemical properties, butyl acetate is relatively stable, but under certain conditions it can undergo hydrolysis to generate acetic acid and butanol. Under the catalytic action of acid or alkali, the hydrolysis reaction will accelerate. At the same time, it is flammable. In case of open flame and high heat energy, it can cause combustion and explosion. Its vapor and air can form an explosive mixture. In case of open flame and high heat energy, it can cause combustion and explosion.

Third, there are two main production methods for producing
butyl acetate. One is the esterification method, which is also the most commonly used method. Acetic acid and n-butanol are used as raw materials, and under the action of acidic catalysts such as concentrated sulfuric acid, the esterification reaction occurs to form butyl acetate. During the reaction process, the reaction temperature, raw material ratio and catalyst dosage should be strictly controlled to improve the yield and selectivity of the reaction. The reaction formula is as follows: $CH_3COOH + C_4H_9OH\ underset {\ Delta} {\ overset {H_2SO_4 }{=\!=\!=}} CH_3COOC_4H_9 + H_2O $. The second method is acetaldehyde acetation method, which uses acetaldehyde as raw material. Under the action of a specific catalyst, the condensation reaction is first carried out to generate crotonaldehyde, and then crotonaldehyde is prepared through a series of steps such as hydrogenation and esterification. Although the steps of this method are relatively complicated, the raw materials are widely sourced, and in some cases it has certain economic advantages.