Manufacturing method of n-propyl acetate
n-propyl acetate is an important organic chemical raw material, which is widely used in the fields of coatings, printing inks, leather, pharmaceuticals, spices and so on. The manufacturing method of n-propyl acetate will be introduced below.
I. Raw materials and equipment
1. Raw materials: acetic acid, n-propanol, catalyst (sulfuric acid or hydrochloric acid).
2. Equipment: reaction kettle, condenser, water separator, oil pump, storage tank and so on.
2. Process flow
1. Feeding: add the quantitative amount of acetic acid and n-propanol into the reaction kettle, and at the same time add the appropriate amount of catalyst.
2. Heating reaction: turn on the stirring, heat the reaction kettle, control the reaction temperature within the appropriate range, and carry out the esterification reaction.
3. Water Separation: Separate the water generated by the reaction through condenser and collect it in the water separator.
4. Post-treatment: After the reaction is finished, the reaction solution is washed, neutralized and decolorized.
5. Distillation: The treated reaction solution is distilled to collect n-propyl acetate product.
Three, the main points of operation
1. Control the reaction temperature: too high a temperature may lead to an increase in side reactions, too low a temperature will slow down the reaction rate, you need to choose the right temperature range.
2. Water separation operation: the water generated by the reaction should be excluded in time to promote the reaction in the direction of generating n-propyl acetate.
3. Catalyst selection: Choosing the right catalyst can improve the reaction rate and reduce the occurrence of side reactions.
4. Post-treatment operations: Post-treatment operations such as washing, neutralization and decolorization can remove impurities and improve product quality.
4. Safety and environmental protection measures
1. Operators need to be professionally trained and familiar with the process and operation points.
2. All process parameters should be strictly controlled during the production process to ensure the normal operation of the equipment.
3. The production process should be equipped with corresponding safety protection measures, such as protective glasses, protective gloves and so on.
4. Waste should be disposed of according to environmental protection requirements to avoid pollution to the environment.
In short, the manufacture of n-propyl acetate requires certain chemical knowledge and technology, and at the same time, it needs to strictly abide by the safety and environmental protection requirements to ensure the smooth progress of the production process and the stability of product quality.
