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Separation Process Engineering: Includes Mass Transfer Analysis, Third Edition by Phillip C. Wankat

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16.7.2 Calculation of Stage Efficiency in Extraction Mixers

For mixers it is customary to work in terms of the dispersed phase values for NTU and HTU. For linear systems the continuous-phase equations will give identical final results. Following Eq. (16-82), the definition of HO–ED in an extraction mixer is

Image

(16-83a)

It is also often very useful to note that because nO–ED = h/HO–ED, we can write nO–ED as

Image

(16-83b)

QD is the volumetric flow rate (m3/s) of the dispersed phase, and Vmixer is the total volume of the mixer (m3). The term Vmixer/QD is ...

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