Ethylene glycol tert-butyl ether (ETB) is an important raw material for the production of chemicals, which is widely used in the fields of solvents, detergents, dyes and pesticides. In this paper, we will introduce a manufacturing method of ethylene glycol tert-butyl ether, which is produced by acid-catalyzed reaction using ethanol and isobutylene as raw materials.
I. Raw materials and equipment
1. Raw materials: ethanol and isobutene
2. Equipment: reactor, condenser, fractionator, storage tank, pump, valve, etc.
II. Manufacturing steps
1. Add ethanol into the reactor and heat it to a certain temperature.
2. Slowly add isobutene under stirring condition, while adding sulfuric acid dropwise as catalyst.
3. Control the temperature and pH during the reaction so that the reaction is carried out under optimal conditions.
4. At the end of the reaction, the reaction solution was distilled to separate the ethylene glycol tert-butyl ether from the unreacted feedstock.
5. The ethylene glycol tert-butyl ether is refined to remove the impurities.
III. Principle of reaction
The manufacturing reaction of ethylene glycol tert-butyl ether is an acid-catalyzed addition reaction with the following equation:
CH3CH(CH3)2 + HOCH2CH2OH → CH3CH(CH3)2OCH2CH2OH
IV. Precautions
1. In the operation process, the temperature and pH should be strictly controlled in order to ensure that the reaction goes on smoothly. .
2. Regular maintenance and overhauling of the equipment should be carried out to ensure the normal operation of the equipment.
3. Operators should be professionally trained and familiar with the operation process and safety operation regulations.
V. Environmental protection and safety
1. In the production process, the treatment of waste gas, waste water and solid waste should be strengthened to reduce the impact on the environment.
2. For potential safety hazards, corresponding safety precautions and emergency plans should be formulated.
6. Economic Benefit Analysis
The main costs in the manufacturing process of ethylene glycol tert-butyl ether include raw material costs, equipment depreciation, labor costs and so on. By optimizing the production process and improving the utilization rate of equipment, the production cost can be reduced and the economic benefit of the enterprise can be improved. Meanwhile, as an important chemical raw material, tert-butyl ether of ethylene glycol has a wide market demand and high added value, so it has a good market prospect.
VII.CONCLUSION
In this paper, a method of manufacturing tert-butyl ether of ethylene glycol by acid-catalyzed reaction using ethanol and isobutylene as raw materials was introduced. The method has the advantages of simple process, convenient operation, high yield, etc., and has better market prospect and economic benefits. In the actual production process, the optimization of the production process and equipment maintenance should be strengthened to improve the production efficiency and quality, and the environmental protection and safety management should be enhanced to ensure the smooth production.
