U18ch084
SUBHAM
EXPERIMENT NO- 5
LEACHING
AIM:
APPARATUS:
CHEMICALS:
THEORY:
PROCEDURE:
To compare efficiency of the operation for different solvents
Round bottom flask, Measuring cylinder, Pipette, Condenser, Heating
mantle
Methanol, Hexane, Acetone, Dichloromethane, Ethyl Acetate
Leaching is the process by which inorganic/organic solutes are released
from the solid phase into the liquid phase under the influence of mineral
dissolution, desorption, complexation processes as affected by pH, etc.
The operation performed at boiling point is known as decoction.
1. Take measured amount (10 g) of crushed patchouli leaves in the flask.
2. Add specified amount of solvent (100 ml) in the flask and attach the
condenser for making open reflux system.
3. Provide heating for 1 h.
4. After cooling the mixture, filter the solution.
5. Analyze the solution using gas chromatogrph. Dilute the solution if
necessary.
6. Calculate the amount of patchouli alcohol (PA) extracted using
calibration curve.
7. Compare the yield of patchouli alcohol (PA) extracted using different
solvents
RESULTS:
CONCLUSION:
CH 308: Mass Transfer Operations-II (P) Page OBSERVATION:
1) Room Temperature
30°C=
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2) Quantity of Solid mixture
3) Volume of Solvent
= 1g
= __50_ mL
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OBSERVATION TABLE
Solvent
Acetone
Methanol
butyl acetate
Hexane
heptane
Concentration of water
hycinth (C, mg/L)
2.5294
4.221
10.6734
3.113
2.47
mg of water hycinth (=
C*Volume of solvent )
0.12647
0.21105
0.53367
0.15565
0.1235
Yield%
1.2647
2.1105
5.3367
1.5565
1.235
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CALCULATION:
Yield = (g of water hycinth * 100)/g of plant material
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