Manufacturing Method of Ethyl Propionate
Ethyl propionate is an important organic chemical raw material, which is widely used in the fields of pharmaceuticals, pesticides, spices, plastics and solvents. This article 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.
I. Raw materials
The raw materials for the manufacture of ethyl propionate mainly include propionic acid, ethanol and catalyst. Among them, the mass ratio of propionic acid and ethanol is generally 1:1.2-1.5, and the catalyst usually adopts acid catalyst such as sulfuric acid or hydrochloric acid.
II. Reaction Principle
The manufacturing 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 form ethyl propionate and water.
III. Process flow
The manufacturing process of ethyl propionate mainly includes the following steps:
1. Propionic acid and ethanol are added into the reactor according to a certain ratio, and an acidic catalyst is added at the same time.
2. The reaction is carried out under a certain temperature and pressure to produce ethyl propionate and water.
3. At the end of the reaction, the reaction solution is distilled to separate the ethyl propionate from the unreacted material.
4. The ethyl propionate is refined to obtain a product with high purity.
4. Equipment
The manufacturing equipment of ethyl propionate mainly includes reactor, distillation tower, condenser, storage tank and so on. Among them, the reactor needs to have the functions of heating, stirring and condensing to ensure the smooth progress of the reaction.
V. Operating Procedure
1. Add the specified amount of propionic acid and ethanol into the reactor, and add acid catalyst at the same time.
2. Turn on the stirring and heating device, control a certain temperature and pressure, and carry out the reaction.
3. At the end of the reaction, transfer the reaction solution to a distillation column for distillation operation.
4. Control the distillation temperature and pressure to separate the ethyl propionate from the unreacted feedstock.
5. The ethyl propionate is subjected to a refining operation to obtain a product of high purity.
6. Control methods
The following control measures are required to ensure the manufacturing quality and yield of ethyl propionate:
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. Sample and analyze the reaction solution regularly to keep abreast of the progress of the reaction and product quality.
4. Carry out regular maintenance and repair of the equipment to ensure the normal operation of the equipment.
VII. 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 the relevant safety operation regulations to avoid leakage, fire and other safety accidents.
2. Properly dispose of the waste to avoid pollution to the environment.
3. Strengthen the ventilation and dustproof measures in the production site to protect the health of employees.
In short, the manufacturing method of ethyl propionate needs to pay attention to raw materials, reaction principle, process flow, equipment, operation steps, control methods and safety and environmental protection requirements. Only by mastering these key technologies can we manufacture high quality and high yield ethyl propionate products.
