Brief description of the production process of ethyl acetate
Raw materials Preparation
The raw materials required for the production of ethyl acetate are mainly ethanol and acetic acid. Purchase high-quality ethanol, the purity of which should reach the industrial standard, the water content is very small, and the impurities are almost negligible. Acetic acid must also be selected with high purity to ensure the high efficiency of the reaction and the purity of the product. Store the raw materials in a special storage tank, and adjust the input amount precisely according to the needs of the reaction process with a fine conveying system.

Reaction stage
In a reactor with good temperature control and stirring functions, inject ethanol and acetic acid according to a specific molar ratio. At the same time, add an appropriate amount of concentrated sulfuric acid as a catalyst to accelerate the reaction rate. Appropriate temperature and pressure conditions are maintained in the reactor. Generally, the temperature is controlled at about [X] ° C, and the pressure is maintained at [X] MPa. Under this environment, ethanol and acetic acid undergo esterification reaction, and the chemical equation is: $CH_3COOH + C_2H_5OH\ underset {\ lower {2pt} {concentrated sulfuric acid}} {\ overset {[X] ° C} {\ rightleftharpoons}} CH_3COOC_2H_5 + H_2O $. This reaction is a reversible reaction. In order to increase the yield of ethyl acetate, the water generated by the reaction needs to be removed in a timely manner according to the principle of Le Chatelier.

After the product separation
reaction is completed, the resulting mixture contains ethyl acetate, unreacted ethanol and acetic acid, catalyst and a small amount of water. The mixture is first introduced into the separation funnel. Due to the difference in density between ethyl acetate and water and other components, it is left to stand and stratified. The upper layer is crude ethyl acetate, and the lower layer is aqueous phase and other impurities. The crude ethyl acetate after preliminary separation still contains a small amount of impurities such as ethanol and acetic acid, so it is further purified by rectifying. The crude product is introduced into the rectifying column. Using the difference in boiling points of each component, through precise control of the temperature layer in the column, the ethanol with low boiling point is evaporated before the top of the tower, and refluxed to the reaction system for recycling; the acetic acid with high boiling point is retained at the bottom of the tower; the high-purity ethyl acetate is extracted at a specific location in the tower, and the purity can reach more than [X]%.

Refining treatment
Although the ethyl acetate after rectification has reached a high purity, it still contains trace impurities, which affects its quality. Therefore, it is necessary to carry out refining treatment, and the ethyl acetate after rectification is passed into the adsorption column containing a specific adsorbent. The adsorbent can effectively absorb the remaining trace impurities, such as pigments, metal ions, etc., so that the color and purity of ethyl acetate can be further improved. The ethyl acetate after this refining process meets the high-quality product standards and can be packaged and stored for sale.

Process auxiliary system
In order to ensure the stable operation of the ethyl acetate production process, a number of auxiliary systems are set up. For example, the cooling system uses circulating cooling water to cool the reactor, distillation tower and other equipment to maintain a suitable reaction and operating temperature; the automatic control system uses various sensors and controllers to monitor and regulate the reaction temperature, pressure, flow and other key parameters in real time to ensure the safety and efficiency of the production process; the waste gas and wastewater treatment system properly treats the waste gas and wastewater generated during the production process to ensure that they meet the standard discharge and practice the concept of environmental protection.