12.20 What is the difference between distillation, distillation under reduced pressure and steam distillation ?
The difference between distillation, distillation under reduced pressure and steam distillation are-
Distillation | Distillation under reduced pressure | Steam Distillation |
1. Used for the purification of the compounds that are non-volatile impurities or liquids, which don't decompose on boiling.
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1. Used to purify liquids, which tends to decompose on boiling. Under the condition of reduced pressure.
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1.Used to purify the organic compounds, which is steam volatile and immiscible with water.
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SImply, to separate the volatile liquids from non-volatile impurities. Or a mixture of liquids having sufficient Boiling point difference. |
The liquid will boil at low temperature than its boiling points, therefore, it does not decompose. | The mixture of water and aniline can be separated by this method.
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The mixture of petrol and kerosene is separated by this method. |
Glycerol is purified by this method. |