what is the criteria for fractional distillation?
Asked by SHERIL SINGH | 18th Aug, 2010, 04:04: PM
Fractional distillation is done to seprate 2 or miscible liquids for which difference in boiling point is less than 25 K
- The trays have many bubble caps in them to allow the vapor to pass through.
- There is a temperature difference across the various trays , they are hot at the bottom and cool at the top
- The vapor rises in the column.
- As the vapor rises through the trays in the column, it cools.
- When a substance in the vapor reaches a height where the temperature of the column is equal to that substance's boiling point, it will condense to form a liquid.
- The substance with the lowest boiling point will condense at the highest point in the column; substances with higher boiling points will condense lower in the column.
- The trays collect the various liquid fractions.
Answered by | 18th Aug, 2010, 05:47: PM
Kindly Sign up for a personalised experience
- Ask Study Doubts
- Sample Papers
- Past Year Papers
- Textbook Solutions
Verify mobile number
Enter the OTP sent to your number