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1. Dr. Babasaheb Ambedkar Technological University
“SEPARATION OF IPA-WATER MIXTURE USING ASPEN PLUS”
Krushnakant Thakare (2030331507018)
Pranoti Lode (2030331507028)
Under the guidance of
PROF. NIKITA MALORE

2. Introduction
Aspen Plus is a widely used process simulation software developed by
Aspen Technology. It is specifically designed for modelling, simulating,
and optimizing chemical processes.
Isopropyl alcohol is widely used in semiconductor industry as cleaning
agent. This waste solvent steam contain mainly is entrainer .Screening is an
important step in extractive distillation.

3. Application
of isopropyl
alcohol
Antiseptic
Liniment for Muscle Aches
Surface Disinfectant
Cleaning Agent
Antrigent

4. Need of
separation
1)Product Purification
2)Recycling and reuse
3)Waste Management
4)Controlled concentration
5)Regulatory compliance

5. Different types of separation method
Extractive
Distillation
Azeotropic
Distillation
Distillation

6. Simulation of Isopropyl Alcohol + Water using Entrainer
Components used: 1)Isopropyl alcohol
2)Water
Entrainer : Dimethyl Sulfoxide (DMSO)
Base method : NRTL
Column: RADFRAC

7. Use of DMSO as Entrainer
1. Azeotrope formation: DMSO can form ternary azeotropes with IPA and water, which can
facilitate the separation process by breaking the azeotrope between IPA and water.
2. Selectivity: DMSO can exhibit selectivity towards certain components in the mixture, which
might be useful in targeted separations.
3. Solubility: DMSO is known for its high solubility in both polar and non-polar solvents, which
can enhance its ability to dissolve IPA and water.
4. High boiling point: DMSO has a relatively high boiling point compared to other entrainers like
methanol. This can be advantageous in specific distillation conditions.

8. Operating Conditions
Operating variable Extractive column
Feed flow rate 100 kmol/hr
Entrainer flow rate 25 kmol/hr
Feed Temperature 30 C
Feed Pressure 1 atm
Entrainer Temperature 30 C
Entrainer pressure 1 atm
Distillate rate 30 kmol/hr
Reflux Ratio 1.2
No. of theoretical stages 37

9. Aspen Plus Working Environment

10. Main Flowsheet

11. Equilibrium diagram of T-xy plot
In an azeotropic mixture, the vapor and liquid phases have the same
composition at a specific temperature, leading to a constant boiling point.

12. Results
15
17
19
21
23
25
27
29
31
33
35
0 50 100
DISTILLATE
RATE
COMPOSITION(kmol/hr)
35 kmol/hr=
99.75%Recovery
IPA
WATER
DMSO
Effect of Distillate Rate
10
13
16
19
22
25
28
31
34
0 50 100
FEED
STAGE
COMPOSITION(KMOL/HR)
32th stage=
99.99% recovery
IPA
WATE
R
Effect of Feed stage
0
5
10
15
20
25
30
35
40
-0.5 0 0.5 1 1.5
STAGES
COMPOSITION(mole)
IPA
WATER
DMSO
Effect of Number of stages

13. .
0.5
0.7
0.9
1.1
1.3
1.5
1.7
1.9
0 50 100
REFLUX
RATIO
COMPOSITION(kmol/hr)
RR=1.5=
99.58% Recovery
IPA
WATER
DMSO
Effect of Reflux ratio
2
3
4
5
6
7
8
9
10
0 50 100
DMSO
COMPOSITION(kmol/hr)
3rd stage=
99.31%Recovery
IPA
WATER
DMSO
Entrainer feed stage
0
3
6
9
12
15
18
21
24
27
30
33
36
39
0 100 200
Stages
Temprature(K)
Temperature and stages profile

14. Conclusion
• The reflux ratio is a critical parameter that influences the separation
performance.
• In column feed is given at atmospheric pressure (1 atm) and room
temperature (30ºC) condition.
• The total number of stages are 37,
• Feed stage at 32th,
• Reflux ratio is 1.5
• Distillate rate is 35 kmol/hr.
• In the overhead product 99.31% are recovered.

15. Thank you