Process with multicomponent multistage

Multicomponent systems containing four or more components become difficult to display graphically. However, process-design calculations can often be made for the extraction of the component with the lowest partition ratio K and treated as a ternaiy system. The components with higher K values may be extracted more thoroughly from the raffinate than the solute chosen for design. Or computer calculations can be used to reduce the tedium of multicomponent, multistage calculations. 

The simulation procedure is then as follows The starting value for the number of theoretical stages is taken from short-cut methods. Distribution coefficients are provided from external correlations. Then, concentrations for the individual (pseudo) components are calculated with algorithms known from multicomponent multistage processes (Figure 2.2-8). 

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