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[Chemical Knowledge]：Production and manufacturing method and process of ethyl propionate

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The manufacturing method
of ethyl propionate
Ethyl propionate is an important organic chemical raw material, which is widely used in the fields of medicine, pesticide, perfume, plastic and solvent. This paper will introduce the manufacturing method of ethyl propionate, including raw materials, reaction principle, process flow, equipment, operation steps, control methods and safety and environmental protection requirements.

1. raw material
The raw materials for the manufacture of ethyl
propionate mainly include propionic acid, ethanol and catalyst. The mass ratio of propionic acid to ethanol is generally 1:1.2-1.5, and the catalyst is generally an acidic catalyst such as sulfuric acid or hydrochloric acid.

2. reaction principle
that the production reaction of ethyl
propionate belongs to esterification reaction, and its reaction equation is: CH3CH2COOH C2H5OH → CH3CH2COOC2H5 H2O. Under the action of acidic catalyst, propionic acid and ethanol react to produce ethyl propionate and water.

3. Process
The manufacturing process of ethyl
propionate mainly includes the following steps:

1. Add propionic acid and ethanol into the reactor according to a certain proportion, and add acid catalyst at the same time.
2. The reaction is carried out at a certain temperature and pressure to produce ethyl propionate and water.
3. After completion of the reaction, the reaction solution was distilled to separate ethyl propionate and unreacted raw materials.
4. Ethyl propionate was purified to obtain a product with high purity.

4. equipment

ethyl propionate manufacturing equipment mainly includes reactors, distillation columns, condensers, storage tanks, etc. Among them, the reactor needs to have the functions of heating, stirring and condensation to ensure the smooth progress of the reaction.

5. Procedure

1. Propionic acid and ethanol are added in the prescribed amounts to the reactor along with the acidic catalyst.
2. Start the stirring and heating device, control a certain temperature and pressure, and carry out the reaction.
3. After completion of the reaction, the reaction liquid is transferred to a distillation column and subjected to distillation operation.
4. Ethyl propionate and unreacted starting materials were separated by controlling the distillation temperature and pressure.
5. Ethyl propionate was refined to obtain a product with high purity.

6. control method

In order to ensure the manufacturing quality and output of ethyl propionate, the following control measures need to be taken:

1. Strictly control the quality and proportion of raw materials to ensure the smooth progress of the reaction.
2. Control the reaction temperature and pressure to avoid the occurrence of side reactions.
3. Timely sampling and analysis of the reaction solution to keep abreast of the reaction progress and product quality.
4. Regular maintenance and maintenance of the equipment to ensure the normal operation of the equipment.

7. safety and environmental protection requirements

In the manufacturing process of ethyl propionate, the following safety and environmental protection requirements need to be paid attention to:

1. Strictly implement relevant safety operation procedures to avoid leakage, fire and other safety accidents.
2. Properly dispose of waste to avoid environmental pollution.
3. Strengthen the ventilation and dust prevention measures at the production site to ensure the health of employees.

In short, the manufacturing method of ethyl propionate requires attention to raw materials, reaction principles, process flows, equipment, operating steps, control methods, and safety and environmental requirements. Only by mastering these key technologies can we produce high-quality and high-yield ethyl propionate products.

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