Operational fractions of batch extractive distillation in a middle vessel column

Operational fractions of batch extractive distillation in a middle vessel column [1]. 

There are two types of extraction processes, namely, leaching where solids are extracted and liquid-liquid extraction. The commonly used leaching equipment is the extraction battery where counter current flow is established resulting in a number of extracting stages. This can be modeled as equilibrium process. The McCabe-Thiele procedure can be used to model this process. In liquid-liquid extraction, ternary diagrams and tie lines are used to determine the extent of extraction. Batch extractive distillation is a commonly used extractive method for liquid-liquid extraction. 

In batch adsorption a component gets distributed in two phases where one of the phases is solid. The differential affinity of various soluble molecules for specific types of solids is the basis of adsorption. In this process, equilibrium is approached between a solid phase, often called the resin or stationary phase, and the soluble molecules in liquid or gas phase. The liquid or gas phase is then called the mobile phase[6]. 

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