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[Chemical Knowledge]：n-Butyl acetate. The production and manufacturing methods and processes of

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The manufacturing method
of n-butyl acetate
n-Butyl acetate is an important organic chemical raw material, which is widely used in coatings, printing inks, leather, medicine, spices and other fields. This article will introduce the manufacturing method of n-butyl acetate.

1. raw materials and equipment

1. raw materials: acetic acid, n-butanol, catalyst (sulfuric acid or hydrochloric acid).
2. Equipment: reaction kettle, condenser, water separator, thermometer, stirrer, storage tank, etc.

2. Process

1. Feeding: The metering of acetic acid and butanol into the reactor, while adding the appropriate amount of catalyst.
2. Heating reaction: turn on the stirrer, heat the reaction kettle, control the reaction temperature at 110-120 ℃, and the reaction time is about 4-6 hours.
3. Water separation: The water generated during the reaction is separated by a water separator to promote the reaction.
4. Post-treatment: After completion of the reaction, the reaction solution was cooled to room temperature, and then allowed to stand and separate into layers. The upper layer is n-butyl acetate, and the lower layer is waste acid water.
5. Distillation: The upper n-butyl acetate was purified by distillation to collect fractions in the boiling point range.
6. Testing and packaging: The purified butyl acetate is tested to ensure that its quality meets the relevant standards. The qualified n-butyl acetate is then packaged and put into storage for use.

3. Precautions

1. Strictly control the reaction temperature to prevent side reactions caused by excessive temperature.
2. The water separator should discharge water in time to keep the system running normally.
3. Pay attention to safety during operation and avoid contact with skin and eyes.
4. Waste acid water should be properly treated to avoid environmental pollution.

4. environmental protection and safety

1. Wastewater treatment: waste acid water produced in the production process should be neutralized to make its pH value meet environmental protection standards before discharge.
2. Waste gas treatment: The waste gas generated in the production process should be absorbed or burned to reduce pollution to the atmosphere.
3. Operation safety: Operators should be professionally trained and strictly abide by the operating procedures to ensure the safe and smooth production process.

5. quality control

In order to ensure the product quality of n-butyl acetate, each batch of products should be tested for quality, including purity, acidity, color and other indicators. For unqualified products, rework or scrap should be carried out to prevent unqualified products from entering the market.

6. optimization and improvement of

In the production process, the production efficiency and quality of n-butyl acetate can be improved by optimizing process parameters and improving equipment structure. At the same time, strengthen the treatment of waste water and waste gas, reduce production costs, and improve the economic and environmental benefits of enterprises.

summary The manufacturing method of

n-butyl acetate includes the steps of feeding, heating reaction, water separation, post-treatment, distillation, detection and packaging. In the production process, process parameters should be strictly controlled, safety and environmental protection should be paid attention to to ensure product quality. By optimizing and improving the production process, the production efficiency and quality can be improved, the production cost can be reduced, and the economic and environmental benefits of the enterprise can be improved.

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