Chemical Engineering - Mass Transfer - Discussion
Discussion Forum : Mass Transfer - Section 10 (Q.No. 5)
5.
Which of the following is the correct ternery diagram for liquid-liquid extraction system comprising of two pairs partly soluble (e.g., chlorobenzene-water-methyl ethyl ketone system) ?
None of these.
Discussion:
2 comments Page 1 of 1.
Amit Kumar said:
3 months ago
Option A represents the typical ternary diagram for a liquid-liquid extraction system with one partially miscible binary pair and a third component that acts as a mutual solvent, extending the miscibility gap. Specifically, for a system like chlorobenzene-water-methyl ethyl ketone:
* Water and chlorobenzene are largely immiscible. This forms the base of the miscibility gap.
* Methyl ethyl ketone (MEK) is the mutual solvent that bridges the two. As MEK is added to a mixture of water and chlorobenzene, it increases their mutual solubility, eventually leading to a single phase. The binodal curve shows this progression.
The curved line represents the boundary between the single-phase region and the two-phase region. The region inside the curve (if it were shown more completely with tie lines) would be the two-phase region where two liquid phases coexist in equilibrium.
In summary, Option A correctly depicts the phase behavior of a liquid-liquid extraction system where two components are largely immiscible and a third component acts as a bridging solvent, leading to a single binodal curve.
* Water and chlorobenzene are largely immiscible. This forms the base of the miscibility gap.
* Methyl ethyl ketone (MEK) is the mutual solvent that bridges the two. As MEK is added to a mixture of water and chlorobenzene, it increases their mutual solubility, eventually leading to a single phase. The binodal curve shows this progression.
The curved line represents the boundary between the single-phase region and the two-phase region. The region inside the curve (if it were shown more completely with tie lines) would be the two-phase region where two liquid phases coexist in equilibrium.
In summary, Option A correctly depicts the phase behavior of a liquid-liquid extraction system where two components are largely immiscible and a third component acts as a bridging solvent, leading to a single binodal curve.
Amit kumar said:
3 years ago
How? please explain the answer.
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