Rectification or counter current distillation is a process for the thermal fine separation of multicomponent mixtures. In contrast to simple distillation, part of the condensate continually runs counter to the vapour, thus allowing a high material exchange between the gas and the liquid phase.
Advantages of rectification
Absorption refers to the absorption of gases and vapours into liquids. A pollutant or reusable material is transferred from the gas phase into the liquid detergent phase and can be isolated in a further process step.
Advantages of absorption