Q11:
1. Locate points and on the ternary phase diagram. Connect with a straight line.
2. Do a material balance to find the composition of one species in the overall mixture. Use this composition to
locate point
along the straight line connection points and . Note the position of point
.
3. Locate point
on the ternary phase diagram. It will be on the equilibrium curve. Draw a straight line
from
to
and extend to find the location of
on the equilibrium curve.
4. On a fresh copy of the graph, with plenty of blank space on each side of the diagram, note the location of
points , , and
(specified/selected) and
(determined in step 3).
5. Draw a straight line between and
. Extend to both sides of the diagram. Draw a second straight line
between and
. Note the intersection of these two lines and label as “ ”.
6. Determine the number of equilibrium stages required to achieve the desired separation with the selected solvent
mass.



MIBK
o
density = 802 kg m-3
o
viscosity = 0.58 cP
o
diffusivity with acetone at 25°C = 2.90×10-9 m2 s-1
Water
o
density = 1000 kg m-3
o
viscosity = 0.895 cP
o
diffusivity with acetone at 25°C = 1.16×10-9 m2 s-1
The interfacial tension of water and MIBK at 25°C = 0.0157 kg s-2. Use the ternary phase diagram
to find .