Why fractional distillation is used to separate miscible liquids whose boiling points is less than 25K ?
Why fractional distillation is used to separate miscible liquids whose boiling points is less than 25K ?
Distillation is the process used to separate the mixtures of miscible liquids. The prinsiple is based on the difference in boiling points of the components. The mixture is heated and in a flask. The liquid which has lower boiling point gets evaporated first. The vapours are condensed in a condensed from which it is collected in a separate flasl
The liquids which have difference in boiling point less that 25 oC can not be separated using simple distillation, fot this fractional distillation is used.
Fractional Distillation:
It is an special type of distillation in which two miscible liquids having different boiling points but closed to each other are separated by fractionating column.
In this process, the the mixture is boiled in a round bottom flask, and the vapors of the boiling solution passes along the fractionating column. The temperature of the column is coolest at the top and gradually increases down as at the bottom it is attached with heating burner. Now, the components with higher boiling points condense first on the column as they are vaporized first and hence after condensing they return to the solution. and the components with lower boiling points further pass through the column and are collected as they are more volatile.
This process is used for separating mixtures like : water and ethanol, or in production of gasoline from crude oil.
The fractionating column, is used to separate the liquids according to the order of their vaporization, so that they get separated as they are vaporized.
Distillation is the process used to separate the mixtures of miscible liquids. The prinsiple is based on the difference in boiling points of the components. The mixture is heated and in a flask. The liquid which has lower boiling point gets evaporated first. The vapours are condensed in a condensed from which it is collected in a separate flasl
The liquids which have difference in boiling point less that 25 oC can not be separated using simple distillation, fot this fractional distillation is used.
Fractional Distillation:
It is an special type of distillation in which two miscible liquids having different boiling points but closed to each other are separated by fractionating column.
In this process, the the mixture is boiled in a round bottom flask, and the vapors of the boiling solution passes along the fractionating column. The temperature of the column is coolest at the top and gradually increases down as at the bottom it is attached with heating burner. Now, the components with higher boiling points condense first on the column as they are vaporized first and hence after condensing they return to the solution. and the components with lower boiling points further pass through the column and are collected as they are more volatile.
This process is used for separating mixtures like : water and ethanol, or in production of gasoline from crude oil.
The fractionating column, is used to separate the liquids according to the order of their vaporization, so that they get separated as they are vaporized.
