Salt-effect distillation
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Salt-effect distillation is a method of
dissolved in the mixture of liquids to be distilled. The salt acts as a separating agent by raising the relative volatility of the mixture and by breaking any azeotropes
that may otherwise form.
Setup
The salt is fed into the
evaporated
to recover the salt for reuse.
Usage
Extractive distillation is more costly than ordinary fractional distillation due to costs associated with the recovery of the separating agent. One advantage of salt-effect distillation over other types of azeotropic distillation is the potential for reduced costs associated with energy usage. In addition, the salt ions have a greater effect on the volatility of the mixture to be distilled than other liquid-separating agents. [1] Commercial usage of salt-effect distillation includes adding
isopropanol mixtures in order to facilitate separation. [2]
References
- ^
Smallwood, Ian McN. (2002), Solvent Recovery Handbook (Second ed.), CRC Press, pp. 166–167, ISBN 0-8493-1602-2, retrieved 2007-11-30
- ^ "Salt-effect distillation", McGraw-Hill Dictionary of Scientific and Technical Terms, McGraw-Hill, 2003, retrieved 2007-11-30
See also
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