Manufacturing Method of Butyl Acetate
Butyl Acetate is an important organic chemical raw material, which is widely used in the fields of coatings, printing ink, leather, medicine, spices and so on. This article will introduce the manufacturing method of butyl acetate, including the reaction principle, process flow, equipment selection, operating conditions, three waste treatment and safety protection.
I. Reaction principle
The manufacture of butyl acetate is mainly done through the esterification reaction of acetic acid and butanol. The esterification reaction is a reversible reaction, which requires the use of catalyst to promote the reaction. Commonly used catalysts are acid catalysts such as sulfuric acid and hydrochloric acid, and biocatalysts such as esterase. The reaction equation is as follows:
CH3COOH + CH3CH2CH2CH2OH → CH3COOCH2CH2CH2CH2CH3 + H2O
II. Process flow
The manufacturing process of butyl acetate mainly consists of the following steps:
1. Ingredients: Acetic acid and butanol are added to the reaction kettle according to a certain molar ratio.
2. Catalytic reaction: Add catalyst and control the reaction temperature within a certain range to carry out esterification reaction.
3. Distillation: After the reaction, the unreacted acetic acid and butanol are separated by distillation to obtain crude butyl acetate.
4. Distillation: Carry out distillation of crude butyl acetate to get the product of butyl acetate with higher purity.
Three, equipment selection
The manufacture of butyl acetate requires the use of equipment such as reaction kettle, distillation tower, distillation tower and so on. In the selection of equipment, according to the production scale, product quality requirements, safety and environmental protection and other factors for comprehensive consideration. 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.
Four, operating conditions
In the manufacturing process of butyl acetate, the following operating conditions need to be controlled:
1. Reaction temperature: control the reaction temperature in a suitable range to promote the esterification reaction.
2. Catalyst dosage: According to the reaction situation and product quality requirements, the dosage of catalyst is reasonably controlled.
3. Distillation pressure: In the process of distillation, it is necessary to control the operating pressure of the distillation tower and the distillation tower to ensure the purity and yield of the product.
V. Three-waste treatment
In the manufacturing process of butyl acetate, some exhaust gas, waste water and solid waste will be generated. In order to ensure environmental protection and safe production, these wastes need to be properly treated. Commonly used treatment methods include:
1. Waste gas treatment: organic substances in the 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: treat solid waste by incineration, landfill and other methods.
VI. 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 personal protective equipments such as protective gloves, glasses, etc. to avoid direct contact with chemicals.
2. Ventilation facilities need to be set up at the production site to maintain air circulation and avoid accumulation of harmful gases.
3. During the operation of the equipment, it is necessary to check the operation of the equipment regularly, find and deal with abnormal situations in time to ensure production safety.
All in all, the manufacture of butyl acetate needs to master the knowledge of reaction principle, process flow, equipment selection, operation conditions, three-waste treatment and safety protection, etc., in order to ensure the quality of the product and the safety and environmental protection of the production.
