Distribution of non-key components graphical method

The graphical procedure proposed by Hengstebeck (1946), which is based on the Fenske equation, is a convenient method for estimating the distribution of components between the top and bottom products. 

Hengstebeck and Geddes (1958) have shown that the Fenske equation can be written in the form  

Specifying the split of the key components determines the constants A and C in the equation. 

The distribution of the other components can be readily determined by plotting the distribution of the keys against their relative volatility on log-log paper, and drawing a straight line through these two points. The method is illustrated in Example 11.6. 

Yaws et al. (1979) have shown that the components distributions calculated by equation 11.63 compare well with those obtained by rigorous plate by plate calculations. 

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