Manufacturing method of n-butyl acetate
N-butyl acetate is an important organic chemical raw material, which is widely used in coatings, printing ink, leather, medicine, spices and other fields. This article will introduce the manufacturing method of n-butyl acetate.
I. 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 and so on.
2. Process flow
1. Feeding: add the measured acetic acid and n-butanol into the reaction kettle, and add the appropriate amount of catalyst at the same time.
2. Heating reaction: turn on the stirrer, heat the reaction kettle, control the reaction temperature at 110-120℃, the reaction time is about 4-6 hours.
3. Water Separation: The water generated during the reaction is separated out through a water separator to promote the reaction.
4. Post-treatment: After the reaction, the reaction solution was cooled to room temperature and then subjected to static layering. The upper layer is n-butyl acetate and the lower layer is waste acid water.
5. Distillation: The upper layer of n-butyl acetate is purified by distillation, and fractions within the boiling point range are collected.
6. Testing and packaging: Test the purified n-butyl acetate to ensure that its quality meets the relevant standards. Then the qualified n-butyl acetate is packed and put into storage for use.
III. Precautions
1. Strictly control the reaction temperature to prevent the high temperature from triggering side reactions.
2. The water separator should discharge water in time to keep the system running normally.
3. Pay attention to safety during operation, avoid contacting skin and eyes.
4. Waste acid water should be properly disposed of to avoid polluting the environment.
4. Environmental protection and safety
1. Waste water treatment: The waste acid water generated in the production process should be neutralized and treated so that its pH value reaches the environmental protection standard before discharge.
2. Waste gas treatment: the waste gas generated in the production process should be absorbed or burned to reduce the pollution of the atmosphere.
3. Operation safety: The operators should be professionally trained and strictly abide by the operation regulations to ensure the production process is safe and smooth.
V. Quality control
To ensure the quality of n-butyl acetate products, each batch of products should be tested for quality, including purity, acidity, color and other indicators. The unqualified products should be reworked or scrapped to prevent the unqualified products from flowing into the market.
VI.Optimization and improvement
In the production process, the production efficiency and quality of n-butyl acetate can be improved by optimizing the process parameters and improving the 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 the enterprise.
Summary
The manufacturing method of n-butyl acetate includes the steps of feeding, heating reaction, water splitting, post-treatment, distillation, testing and packaging. During the production process, the process parameters should be strictly controlled, safety and environmental protection should be paid attention to, and product quality should be ensured. 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.
