हिंदी

Methods of Separation - Steam Distillation

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Estimated time: 2 minutes
CBSE: Class 12

Key Points: Steam Distillation

Applicable for separation/purification of organic compounds (solids or liquids) that are:

  1. Insoluble in water
  2. Volatile in steam
  3. Have vapour pressure 10–15 mm Hg at 373 K
  4. Contain non-volatile impurities

Organic compound is passed with steam → distils at a temperature below its normal boiling point.

Example: Aniline (b.p. 457 K) purified by steam distillation at 371.5 K.

Other examples: nitrobenzene, bromobenzene, o-nitrophenol, salicylaldehyde, o-hydroxyacetophenone, essential oils, turpentine oil.

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