Manufacturing method of tetrachloroethane
Tetrachloroethane is an important raw material for chemical production, widely used in pesticides, pharmaceuticals, solvents and other fields. In this article, we will introduce the manufacturing method of tetrachloroethane, including raw material preparation, reaction process, post-treatment and other aspects.
I. Raw material preparation
The main raw material for manufacturing tetrachloroethane is chloroethane. Chloroethane is a colorless transparent and volatile liquid with a strong irritating odor. Before manufacturing tetrachloroethane, it is necessary to purify chloroethane to ensure its quality and purity.
II. Reaction process
1. Chlorination reaction
In the process of manufacturing tetrachloroethane, chlorination reaction is needed first. Chloroethane is mixed with chlorine gas and reacted at a certain temperature and pressure to produce a mixture of dichloroethane and trichloroethane. The temperature and pressure of the chlorination reaction need to be adjusted according to the specific situation to ensure that the reaction proceeds and the quality of the products.
2. Pyrolysis reaction
The resulting mixture of dichloroethane and trichloroethane requires further pyrolysis to produce tetrachloroethane. The mixture is heated to a temperature where it undergoes a pyrolysis reaction to produce tetrachloroethane and other by-products. The temperature and time of the pyrolysis reaction also need to be adjusted according to the actual situation to ensure the purity and yield of the product.
Three, post-treatment
After the reaction is completed, the product needs to be post-treated to obtain pure tetrachloroethane. The method of distillation is usually used to separate the impurities and by-products in the product to obtain high purity tetrachloroethane. In the process of distillation, it needs to be adjusted according to the boiling point of the product and the vapor pressure and other properties to ensure the separation effect and the quality of the product.
IV. Precautions
1. In the process of manufacturing tetrachloroethane, safety needs to be observed to avoid hazardous factors such as leakage and exposure to ignition sources.
2. Chlorination reaction and pyrolysis reaction process will produce a lot of heat, effective cooling and temperature control is needed to avoid equipment damage and product quality problems.
3. In the post-treatment process, the cleanliness and sealing of the equipment need to be ensured to avoid contamination and loss of products.
In short, the manufacturing method of tetrachloroethane requires mastery of certain chemical reaction principles and process technology, and at the same time, attention needs to be paid to the requirements of safety and environmental protection. Only when the manufacturing is carried out in strict accordance with the specified operating procedures and requirements, can the quality and purity of the product be ensured and better economic and social benefits be created for the enterprise.
