Mass Transfer
An example of elutioh is

Separation of sugar from sugar beet by hot water
Separation of uranium oxide from its ore by H₂SO₄ in a Pachuca tank
Recovery of vegetable oils from seeds
Dissolution of tannin out of tree barks by water

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Mass Transfer
As the reflux ratio in a distillation coloumn is increased from the minimum, the

Number of plates decreases very slowly first and then more and more rapidly
Slope of the operating line in stripping section decreases
Liquid flow increases while the vapor flow decreases for a system
Total cost first decreases and then increases

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