Manufacturing method of diethylene glycol
I. Introduction
Diethylene glycol is an important raw material for the production of chemicals, which is widely used in the fields of coatings, inks, detergents, antifreeze and so on. With the increasing market demand, the manufacturing method of diethylene glycol has become a hot spot of research. In this paper, a common manufacturing method of diethylene glycol will be introduced.
II. Materials and equipment
1. Materials: ethylene glycol, sodium hydroxide, catalyst (such as magnesium sulfate), water, etc.
2. Equipment: reactor, stirrer, thermometer, condenser, dispensing funnel, etc.
3. Manufacturing steps
1. Add ethylene glycol and water into the reaction kettle in a certain proportion and stir well.
2. Add catalyst, warm up to a certain temperature, keep constant temperature reaction for a certain time.
3. Add sodium hydroxide solution, adjust pH to neutral, continue stirring for a certain time.
4. Cool down to room temperature and leave to separate the aqueous layer from the organic layer.
5. Distill the organic layer and collect the diethylene glycol product.
4. Precautions
1. Strictly control the reaction temperature and time to prevent the generation of by-products.
2. When adjusting pH, avoid excessive alkali leading to large loss of ethylene glycol.
3. During the distillation process, the distillation speed and temperature should be controlled to avoid decomposition of the product.
V. Conclusion
Through the above steps, we can make high quality diethylene glycol products. In the actual production process, we need to adjust the process parameters according to the specific situation to ensure the quality and yield of the product. At the same time, we also need to pay attention to the safety of the production process to ensure the smooth progress of the production process.
The above is a common manufacturing method of diethylene glycol, but the specific manufacturing method may vary depending on different raw materials, equipment, process conditions and other factors. Therefore, in the actual production process, we need to choose the appropriate manufacturing method according to the actual situation, and constantly optimize the process parameters to improve the quality and yield of the product.
