Single evaporation is a method of distillation . It is used along with gradual and multiple evaporation as a method of separating component components of mixtures of mutually soluble liquids into separate components or fractions (for complex mixtures, such as oil ), which differ in boiling points both from each other and from the initial mixture.
During distillation with a single evaporation, the mixture is heated in the coil of a heater to a predetermined temperature. As the temperature rises, more and more vapors are formed that are in equilibrium with the liquid phase, and at a given temperature the vapor-liquid mixture leaves the heater and enters the adiabatic evaporator. The latter is a hollow cylinder in which the vapor phase is separated from the liquid. The temperature of the vapor and liquid phases in this case is the same. The sharpest separation of the mixture during distillation with a single evaporation is the worst.