Boiling Point of Dichloroethane: An In-Depth Analysis and Factors Affecting It
Basic Overview of Dichloroethane
Ethylene Dichloride (EDC for short) is an important organic chemical raw material, mainly used in the production of polyvinyl chloride (PVC). Its chemical formula is C2H4Cl2, and it belongs to chlorinated hydrocarbons. Understanding the physicochemical properties of EDC is crucial for its application in industry, among which, the boiling point of EDC is an important parameter, which directly affects its operating conditions and safety in the production process.
Determination of the boiling point of dichloroethane
The boiling point of dichloroethane is the temperature at which a liquid of dichloroethane becomes a gas under a certain pressure. Under standard atmospheric pressure (101.3 kPa), the boiling point of dichloroethane is 83.5°C. This relatively low boiling point makes it easy to evaporate and produce flammable gases at room temperature, so special attention needs to be paid to the conditions of sealing and ventilation when storing and transporting it in order to prevent accidents.
Factors affecting the boiling point of dichloroethane
Influence of pressure
The boiling point of dichloroethane varies with changes in external pressure. When the pressure decreases, the boiling point of dichloroethane also decreases. This property is important in industrial distillation processes where operators can control the evaporation and condensation process of dichloroethane by adjusting the pressure.

Effect of purity
The purity of dichloroethane is also an important factor in its boiling point. In industrial production, dichloroethane usually contains small amounts of impurities that may cause the boiling point to rise or fall. Therefore, in high-precision applications, it is often necessary to distil dichloroethane to increase its purity and thus ensure that its boiling point is stable.

Azeotropic phenomena
When dichloroethane is mixed with other solvents, azeotropes may form, causing the boiling point of the mixture to differ from that of pure dichloroethane. For example, dichloroethane and water can form an azeotrope, and when distilled at the azeotrope, the boiling point of the mixture is lower than that of the pure solvent. This phenomenon is important in solvent recovery and separation processes.

Industrial applications of the boiling point of dichloroethane
The boiling point of dichloroethane not only influences its physical operating conditions, but also plays a key role in chemical production. In the production of PVC, dichloroethane is cracked to form vinyl chloride monomer (VCM), a process that usually takes place at high temperatures. Understanding and controlling the boiling point of dichloroethane can optimise the production process, reduce energy consumption and improve reaction efficiency. Dichloroethane is also widely used in organic synthesis, solvent cleaning and other fields, and its boiling point directly affects its use and effectiveness.
Summary
The boiling point of dichloroethane is an important physical parameter of the compound and directly affects its performance in industrial production and applications. By understanding and controlling the factors that affect the boiling point of dichloroethane, chemical companies can optimise processes, reduce costs and ensure safe production. Therefore, when handling and applying dichloroethane, it is always necessary to pay attention to its boiling point and related operating conditions to ensure efficient and safe production.