WOLFRAM|DEMONSTRATIONS PROJECT

Hunter-Nash Method for Liquid-Liquid Extraction (LLE)

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plot points
mixing point
operating point
count stages
feed mole fractions
(solute/solvent/carrier)
0.45/0.08/0.48
feed
solvent
raffinate
show grid
The Hunter–Nash method determines the number of equilibrium stages needed for liquid-liquid extraction (LLE). The desired raffinate (refined product) composition
R
N
, the feed
F
, and the solvent
S
mass flow rates are given.
Select a feed composition from the drop-down menu. Select the "plot points" tab to show how the points (feed, solvent, and desired raffinate) are plotted on the ternary phase diagram. For the "mixing point" tab, this option demonstrates how the lever rule is used to determine the mixing point
M
. Check the box "show
E
1
" to see how the composition of the extract in the first stage
E
1
is found. Select "operating point" from the list to see how the operating point
P
(in purple) is determined. Finally, select "count stages" to determine the number of equilibrium stages needed to reach the desired raffinate composition. For any of the displays, check "show grid" to display grid lines on the ternary diagram.