Principle of Steam Distillation:
- It is used to distil heat-sensitive components by passing steam through the mixture, causing volatile components to co-distil with water at temperatures lower than their boiling points.
Methodology of Steam Distillation:
- Setup: Includes a steam generator, distillation flask, condenser, and collection vessel.
- Steam Introduction: Steam is introduced into the mixture, lowering the boiling points of the volatile components.
- Co-distillation: The volatile components vaporize along with the steam.
- Condensation and Collection: The vapor mixture is condensed, and the distillate (mixture of water and volatile components) is collected.
Uses:
- Extraction of essential oils from plant materials.
- Distillation of organic compounds that decompose at high temperatures.
- Used in the fragrance, flavor, and cosmetic industries.
Merits:
- Suitable for heat-sensitive materials.
- Can distill components at temperatures lower than their normal boiling points.
- Simple and cost-effective setup.
Demerits:
- Limited to compounds that are volatile in steam.
- Requires a continuous supply of steam.
- Separation may not be as complete as other methods.
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