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[Chemical Knowledge]：Production method and process of butyl acetate

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Manufacturing method

of butyl acetate Butyl acetate is an important organic chemical raw material, which is widely used in coating, printing ink, leather, medicine, fragrance and other fields. This paper will introduce the manufacturing method of butyl acetate, including reaction principle, process flow, equipment selection, operating conditions, three waste treatment and safety protection.

1. reaction principle

the manufacture of butyl acetate is mainly through the esterification reaction of acetic acid and butanol. The esterification reaction is a reversible reaction and requires the use of a catalyst to promote the reaction. Commonly used catalysts include acid catalysts such as sulfuric acid and hydrochloric acid, and biological catalysts such as esterifying enzymes. The reaction equation is as follows:

CH3COOH CH3CH2CH2CH2OH → CH3COOCH2CH2CH2CH3 H2O

2. Process

The manufacturing process of butyl acetate mainly includes the following steps:

1. Ingredients: Acetic acid and butanol are added to the reactor according to a certain molar ratio.

2. Catalytic reaction: Add catalyst, control the reaction temperature in a certain range, the esterification reaction.

3. Distillation: After completion of the reaction, unreacted acetic acid and butanol were separated by distillation to obtain crude butyl acetate.

4. distillation: distillation of crude butyl acetate to obtain high purity butyl acetate product.

3. equipment selection

The manufacture of butyl acetate requires the use of reactor, distillation tower, distillation tower and other equipment. When selecting equipment, it is necessary to consider factors such as production scale, product quality requirements, safety and environmental protection. At the same time, the material of the equipment needs to have corrosion resistance, high temperature resistance and other characteristics to ensure the stability and reliability of the equipment.

4. Operating Conditions

In the manufacturing process of butyl acetate, the following operating conditions need to be controlled:

1. Reaction temperature: The reaction temperature is controlled within a suitable range to promote the esterification reaction.

2. catalyst dosage: according to the reaction and product quality requirements, reasonable control of the amount of catalyst.

3. Distillation pressure: During the distillation process, the operating pressure of the distillation column and the rectifying column needs to be controlled to ensure the purity and yield of the product.

5. three waste treatment

In the manufacturing process of butyl acetate, some waste gas, waste water and solid waste will be produced. In order to ensure environmental protection and safe production, these wastes need to be properly disposed. Commonly used treatment methods include:

1. Waste gas treatment: organic substances in waste gas are treated by adsorption, combustion and other methods.

2. Wastewater treatment: physical, chemical or biological methods are used to treat pollutants in wastewater.

3. solid waste treatment: through incineration, landfill and other methods to deal with solid waste.

6. safety protection

In the manufacturing process of butyl acetate, the following safety protection measures need to be paid attention to:

1. Operators need to wear protective gloves, glasses and other personal protective equipment to avoid direct contact with chemicals.

2. The production site needs to set up ventilation facilities to maintain air circulation and avoid the accumulation of harmful gases.

3. During the operation of the equipment, it is necessary to regularly check the operation of the equipment, discover and deal with abnormal situations in time to ensure production safety.

In short, the manufacture of butyl acetate requires knowledge of the reaction principle, process flow, equipment selection, operating conditions, waste treatment and safety protection to ensure product quality and production safety and environmental protection.

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