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

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Manufacturing method
of n-butyl acetate
n-Butyl acetate is an important organic chemical raw material, which is widely used in coatings, inks, spices, pharmaceuticals and other fields. This paper will introduce the manufacturing method of n-butyl acetate, including the reaction principle, process flow, equipment selection, operation points, safety and environmental protection.

1. Reaction Principle

The production of n-butyl acetate is achieved by the esterification reaction of acetic acid and n-butanol. Esterification is an acid-base catalyzed reversible reaction, which requires the use of a catalyst to promote the reaction. Commonly used catalysts include sulfuric acid, hydrochloric acid, p-toluenesulfonic acid and other acidic catalysts and alkaline catalysts. In the reaction process, acetic acid and n-butanol in the presence of a catalyst to produce n-butyl acetate and water.

2. Process

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

1. Ingredients: Acetic acid and n-butanol are added to the reactor according to a certain molar ratio, and the catalyst is added at the same time.

2. reaction: heating and stirring in a reaction kettle, the esterification reaction of acetic acid and n-butanol under the action of a catalyst to generate n-butyl acetate and water.

3. Separation: After completion of the reaction, the reaction mixture was cooled to room temperature, and unreacted raw materials and catalyst were separated to obtain crude n-butyl acetate.

4. Refining: The crude n-butyl acetate is distilled to remove impurities and moisture to obtain pure n-butyl acetate.

3. equipment selection

In the manufacturing process of n-butyl acetate, the following equipment needs to be used:

1. Reactor: For ingredients and reactions, equipment with heating, stirring and cooling functions should be selected.

2. Separation equipment: used to separate unreacted raw materials and catalysts, you can choose equipment such as centrifuges or filters.

3. distillation equipment: used for refining crude n-butyl acetate, should choose a distillation, condensation, reflux function of the equipment.

4. operating points

In the manufacturing process of n-butyl acetate, the following operating points need to be paid attention to:

1. Control the reaction temperature and time to ensure the full progress of the reaction.

2. Control the amount and type of catalyst to improve reaction efficiency and product purity.

3. In the process of separation and purification, the parameters such as temperature and pressure should be controlled to avoid the loss of product and the decline of quality.

5. Safety and environmental protection

In the manufacturing process of n-butyl acetate, the following safety and environmental protection issues need to be paid attention to:

1. Strengthen the management of raw materials and catalysts to avoid leakage and environmental pollution.

2. Strengthen the inspection and maintenance of reaction equipment and pipelines to prevent leakage and accidents.

3. The waste gas and waste water are treated and treated, and then discharged after meeting the environmental protection requirements.

In short, the manufacture of n-butyl acetate requires knowledge of the reaction principle, process flow, equipment selection, operation points and safety and environmental protection to ensure the smooth progress of production and the stable improvement of product quality.

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