To separate gold from silver, for example.
You would use simple distillation when the two products you are trying to separate have large difference in boiling points. Fractional distillation is needed when the two products have very close boiling points (like Hexane and toluene). In petroleum refining, the word "fractionation", not "fractional distillation" is used, often interchangeably with "distillation". When we have a crude mixture of different compounds which have very minor difference in their boiling points and cannot be separated simple distillation, then fractional distillation is used. Differenciation of components of petroleum is done by this process
Whether it is better to use fractional or simple distillation depends on the liquids being separated and on the boiling points of the liquids. When there is a great difference between the boiling points of the liquids, simple distillation may be a better option. Likewise, if there is a small difference in boiling points, then fractional distillation is used.
Fractional distillation is used to separe the components of a liquid.
Electrolysis is a process, fractional distillation another.
After fractional distillation petrol is not a mixture.
Most of the gases in air, Nitrogen, Oxygen, Argon and others are obtained by fractional distillation of liquid air.
Fractional distillation is applied when many components exist an the differences between boiling points are under 25 oC.
You can use techniques like distillation, fractional distillation, or chromatography to separate a mixture of liquids based on their boiling points, vapor pressures, or solubility differences. These methods exploit the physical properties of the liquids to separate them effectively.
fractional distillation
Fractional distillation is a separation method based on the differences between boiling poins of components.
This is an distillation installation with columns.
This is the top of a distillation installation.